diff --git a/worblehat/cli/main.py b/worblehat/cli/main.py
index 05cc32b..3095b0f 100644
--- a/worblehat/cli/main.py
+++ b/worblehat/cli/main.py
@@ -61,26 +61,6 @@ class WorblehatCli(NumberedCmd):
                     exit(0)
 
 
-    def do_list_bookcases(self, _: str):
-        bookcase_shelfs = self.sql_session.scalars(
-            select(BookcaseShelf)
-            .join(Bookcase)
-            .order_by(
-              Bookcase.name,
-              BookcaseShelf.column,
-              BookcaseShelf.row,
-            )
-        ).all()
-
-        bookcase_uid = None
-        for shelf in bookcase_shelfs:
-            if shelf.bookcase.uid != bookcase_uid:
-                print(shelf.bookcase.short_str())
-                bookcase_uid = shelf.bookcase.uid
-
-            print(f'  {shelf.short_str()} - {sum(i.amount for i in shelf.items)} items')
-
-
     def do_show_bookcase(self, arg: str):
         bookcase_selector = InteractiveItemSelector(
             cls = Bookcase,
@@ -95,6 +75,35 @@ class WorblehatCli(NumberedCmd):
                 print(f'  {item.name} - {item.amount} copies')
 
 
+    def do_show_borrowed_queued(self, _: str):
+        borrowed_items = self.sql_session.scalars(
+            select(BookcaseItemBorrowing)
+            .where(BookcaseItemBorrowing.delivered.is_(None))
+            .order_by(BookcaseItemBorrowing.end_time),
+        ).all()
+
+        if len(borrowed_items) == 0:
+            print('No borrowed items found.')
+        else:
+          print('Borrowed items:')
+          for item in borrowed_items:
+              print(f'- {item.username} - {item.item.name} - to be delivered by {item.end_time.strftime("%Y-%m-%d")}')
+
+        print()
+
+        queued_items = self.sql_session.scalars(
+            select(BookcaseItemBorrowingQueue)
+            .order_by(BookcaseItemBorrowingQueue.entered_queue_time),
+        ).all()
+
+        if len(queued_items) == 0:
+            print('No queued items found.')
+        else:
+          print('Users in queue:')
+          for item in queued_items:
+              print(f'- {item.username} - {item.item.name} - entered queue at {item.entered_queue_time.strftime("%Y-%m-%d")}')
+
+
     def _create_bookcase_item(self, isbn: str):
         bookcase_item = create_bookcase_item_from_isbn(isbn, self.sql_session)
         if bookcase_item is None:
@@ -149,6 +158,8 @@ class WorblehatCli(NumberedCmd):
         if (existing_item := self.sql_session.scalars(
             select(BookcaseItem)
             .where(BookcaseItem.isbn == isbn)
+            .join(BookcaseItemBorrowing)
+            .join(BookcaseItemBorrowingQueue)
         ).one_or_none()) is not None:
             print(f'\nFound existing item for isbn "{isbn}"')
             BookcaseItemCli(
@@ -185,11 +196,12 @@ class WorblehatCli(NumberedCmd):
         ).all()
 
         if len(slubberter) == 0:
-            print('No slubberts found. Yay!')
+            print('No slubberts found. Life is good.')
             return
 
         for slubbert in slubberter:
-            print(f'{slubbert.username} - {slubbert.item.name} - {slubbert.end_time.strftime("%Y-%m-%d")}')
+            print('Slubberter:')
+            print(f'- {slubbert.username} - {slubbert.item.name} - {slubbert.end_time.strftime("%Y-%m-%d")}')
 
 
     def do_advanced(self, _: str):
@@ -225,20 +237,20 @@ class WorblehatCli(NumberedCmd):
             'doc': 'Choose / Add item with its ISBN',
         },
         1: {
-            'f': do_list_bookcases,
-            'doc': 'List all bookcases',
-        },
-        2: {
             'f': do_search,
             'doc': 'Search',
         },
-        3: {
+        2: {
             'f': do_show_bookcase,
             'doc': 'Show a bookcase, and its items',
         },
+        3: {
+            'f': do_show_borrowed_queued,
+            'doc': 'Show borrowed/queued items',
+        },
         4: {
             'f': do_show_slabbedasker,
-            'doc': 'Show a slabbedasker, and their wicked ways',
+            'doc': 'Show slabbedasker',
         },
         5: {
             'f': do_save,
diff --git a/worblehat/cli/prompt_utils.py b/worblehat/cli/prompt_utils.py
index d2fac67..9989cc8 100644
--- a/worblehat/cli/prompt_utils.py
+++ b/worblehat/cli/prompt_utils.py
@@ -58,6 +58,7 @@ class InteractiveItemSelector(Cmd):
         self.execute_selection = execute_selection
         self.complete_selection = complete_selection
         self.default_item = default
+        self.result = None
 
         if default is not None:
           self.prompt = f'Select {cls.__name__} [{default.name}]> '
@@ -197,6 +198,7 @@ class NumberedItemSelector(NumberedCmd):
         super().__init__()
         self.items = items
         self.stringify = stringify
+        self.result = None
         self.funcs = {
             i: {
                 'f': self._select_item,
diff --git a/worblehat/cli/subclis/advanced_options.py b/worblehat/cli/subclis/advanced_options.py
index 6cd7f1c..c727092 100644
--- a/worblehat/cli/subclis/advanced_options.py
+++ b/worblehat/cli/subclis/advanced_options.py
@@ -91,6 +91,26 @@ class AdvancedOptionsCli(NumberedCmd):
         self.sql_session.flush()
 
 
+    def do_list_bookcases(self, _: str):
+        bookcase_shelfs = self.sql_session.scalars(
+            select(BookcaseShelf)
+            .join(Bookcase)
+            .order_by(
+              Bookcase.name,
+              BookcaseShelf.column,
+              BookcaseShelf.row,
+            )
+        ).all()
+
+        bookcase_uid = None
+        for shelf in bookcase_shelfs:
+            if shelf.bookcase.uid != bookcase_uid:
+                print(shelf.bookcase.short_str())
+                bookcase_uid = shelf.bookcase.uid
+
+            print(f'  {shelf.short_str()} - {sum(i.amount for i in shelf.items)} items')
+
+
     def do_done(self, _: str):
         return True
 
@@ -104,6 +124,10 @@ class AdvancedOptionsCli(NumberedCmd):
             'f': do_add_bookcase_shelf,
             'doc': 'Add bookcase shelf',
         },
+        3: {
+            'f': do_list_bookcases,
+            'doc': 'List all bookcases',
+        },
         9: {
             'f': do_done,
             'doc': 'Done',
diff --git a/worblehat/cli/subclis/bookcase_item.py b/worblehat/cli/subclis/bookcase_item.py
index 2672a50..40e3a22 100644
--- a/worblehat/cli/subclis/bookcase_item.py
+++ b/worblehat/cli/subclis/bookcase_item.py
@@ -1,4 +1,4 @@
-from datetime import datetime
+from datetime import datetime, timedelta
 from textwrap import dedent
 from sqlalchemy import select
 
@@ -7,6 +7,7 @@ from sqlalchemy.orm import Session
 from worblehat.cli.prompt_utils import (
     InteractiveItemSelector,
     NumberedCmd,
+    NumberedItemSelector,
     format_date,
     prompt_yes_no,
 )
@@ -22,6 +23,7 @@ from worblehat.services.bookcase_item import (
     create_bookcase_item_from_isbn,
     is_valid_isbn,
 )
+from worblehat.services.config import Config
 
 from .bookcase_shelf_selector import select_bookcase_shelf
 
@@ -174,6 +176,50 @@ class BookcaseItemCli(NumberedCmd):
         print(f'Successfully delivered the item for {borrowing.username}')
 
 
+    def do_extend_borrowing(self, _: str):
+        borrowings = self.sql_session.scalars(
+            select(BookcaseItemBorrowing)
+            .join(BookcaseItem, BookcaseItem.uid == BookcaseItemBorrowing.fk_bookcase_item_uid)
+            .where(BookcaseItem.isbn == self.bookcase_item.isbn)
+            .order_by(BookcaseItemBorrowing.username)
+        ).all()
+
+        if len(borrowings) == 0:
+            print('No one seems to have borrowed this item')
+            return
+
+        borrowing_queue = self.sql_session.scalars(
+            select(BookcaseItemBorrowingQueue)
+            .where(
+                BookcaseItemBorrowingQueue.item == self.bookcase_item,
+                BookcaseItemBorrowingQueue.item_became_available_time == None,
+            )
+            .order_by(BookcaseItemBorrowingQueue.entered_queue_time)
+        ).all()
+
+        if len(borrowing_queue) != 0:
+          print('Sorry, you cannot extend the borrowing because there are people waiting in the queue')
+          print('Borrowing queue:')
+          for i, b in enumerate(borrowing_queue):
+              print(f'  {i + 1}) {b.username}')
+          return
+
+        print('Who are you?')
+        selector = NumberedItemSelector(
+            items = list(borrowings),
+            stringify = lambda b: f'{b.username} - Until {format_date(b.end_time)}',
+        )
+        selector.cmdloop()
+        if selector.result is None:
+            return
+        borrowing = selector.result
+
+        borrowing.end_time = datetime.now() + timedelta(days=int(Config['deadline_daemon.days_before_queue_position_expires']))
+        self.sql_session.flush()
+
+        print(f'Successfully extended the borrowing for {borrowing.username} until {format_date(borrowing.end_time)}')
+
+
     def do_done(self, _: str):
         return True
 
@@ -188,10 +234,14 @@ class BookcaseItemCli(NumberedCmd):
             'doc': 'Deliver',
         },
         3: {
+            'f': do_extend_borrowing,
+            'doc': 'Extend borrowing',
+        },
+        4: {
             'f': do_edit,
             'doc': 'Edit',
         },
-        4: {
+        5: {
             'f': do_update_data,
             'doc': 'Pull updated data from online databases',
         },
diff --git a/worblehat/cli/subclis/search.py b/worblehat/cli/subclis/search.py
index aff7499..8bb7d4a 100644
--- a/worblehat/cli/subclis/search.py
+++ b/worblehat/cli/subclis/search.py
@@ -13,6 +13,7 @@ class SearchCli(NumberedCmd):
     def __init__(self, sql_session: Session):
         super().__init__()
         self.sql_session = sql_session
+        self.result = None
 
 
     def do_search_all(self, _: str):
@@ -57,11 +58,11 @@ class SearchCli(NumberedCmd):
         elif len(author) == 1:
             selected_author = author[0]
             print('Found author:')
-            print(f"  {selected_author.name} ({sum(item.amount for item in selected_author.books)} items)")
+            print(f"  {selected_author.name} ({sum(item.amount for item in selected_author.items)} items)")
         else:
             selector = NumberedItemSelector(
                 items = author,
-                stringify = lambda author: f"{author.name} ({sum(item.amount for item in author.books)} items)",
+                stringify = lambda author: f"{author.name} ({sum(item.amount for item in author.items)} items)",
             )
             selector.cmdloop()
             if selector.result is None:
@@ -69,7 +70,7 @@ class SearchCli(NumberedCmd):
             selected_author = selector.result
 
         selector = NumberedItemSelector(
-            items = selected_author.books,
+            items = list(selected_author.items),
             stringify = lambda item: f"{item.name} ({item.isbn})",
         )
         selector.cmdloop()
diff --git a/worblehat/services/seed_test_data.py b/worblehat/services/seed_test_data.py
index 04388c9..021816e 100644
--- a/worblehat/services/seed_test_data.py
+++ b/worblehat/services/seed_test_data.py
@@ -1,4 +1,5 @@
 import csv
+from datetime import datetime, timedelta
 from pathlib import Path
 
 from sqlalchemy.orm import Session
@@ -6,7 +7,11 @@ from sqlalchemy.orm import Session
 from worblehat.flaskapp.database import db
 
 from ..models import (
+    Author,
     Bookcase,
+    BookcaseItem,
+    BookcaseItemBorrowing,
+    BookcaseItemBorrowingQueue,
     BookcaseShelf,
     Language,
     MediaType,
@@ -117,6 +122,100 @@ def seed_data(sql_session: Session = db.session):
         BookcaseShelf(row=0, column=4, bookcase=bookcases[4], description="Religion"),
     ]
 
+    authors = [
+        Author(name="Donald E. Knuth"),
+        Author(name="J.K. Rowling"),
+        Author(name="J.R.R. Tolkien"),
+        Author(name="George R.R. Martin"),
+        Author(name="Stephen King"),
+        Author(name="Agatha Christie"),
+    ]
+
+    book1 = BookcaseItem(
+        name = "The Art of Computer Programming",
+        isbn = "9780201896831",
+    )
+    book1.authors.add(authors[0])
+    book1.media_type = media_types[0]
+    book1.shelf = shelfs[59]
+
+    book2 = BookcaseItem(
+        name = "Harry Potter and the Philosopher's Stone",
+        isbn = "9780747532743",
+    )
+    book2.authors.add(authors[1])
+    book2.media_type = media_types[0]
+    book2.shelf = shelfs[-1]
+
+    book_owned_by_other_user = BookcaseItem(
+        name = "Book owned by other user",
+        isbn = "9780747532744",
+    )
+
+    book_owned_by_other_user.owner = "other_user"
+    book_owned_by_other_user.authors.add(authors[4])
+    book_owned_by_other_user.media_type = media_types[0]
+    book_owned_by_other_user.shelf = shelfs[-2]
+
+    borrowed_book_more_available = BookcaseItem(
+        name = "Borrowed book with more available",
+        isbn = "9780747532745",
+    )
+    borrowed_book_more_available.authors.add(authors[5])
+    borrowed_book_more_available.media_type = media_types[0]
+    borrowed_book_more_available.shelf = shelfs[-3]
+    borrowed_book_more_available.amount = 2
+
+    borrowed_book_no_more_available = BookcaseItem(
+        name = "Borrowed book with no more available",
+        isbn = "9780747532746",
+    )
+    borrowed_book_no_more_available.authors.add(authors[5])
+    borrowed_book_no_more_available.media_type = media_types[0]
+    borrowed_book_no_more_available.shelf = shelfs[-3]
+
+    borrowed_book_people_in_queue = BookcaseItem(
+        name = "Borrowed book with people in queue",
+        isbn = "9780747532747",
+    )
+    borrowed_book_people_in_queue.authors.add(authors[5])
+    borrowed_book_people_in_queue.media_type = media_types[0]
+    borrowed_book_people_in_queue.shelf = shelfs[-3]
+
+    borrowed_book_by_slabbedask = BookcaseItem(
+        name = "Borrowed book by slabbedask",
+        isbn = "9780747532748",
+    )
+    borrowed_book_by_slabbedask.authors.add(authors[5])
+    borrowed_book_by_slabbedask.media_type = media_types[0]
+    borrowed_book_by_slabbedask.shelf = shelfs[-3]
+
+    books = [
+        book1,
+        book2,
+        book_owned_by_other_user,
+        borrowed_book_more_available,
+        borrowed_book_no_more_available,
+        borrowed_book_people_in_queue,
+    ]
+
+    slabbedask_borrowing = BookcaseItemBorrowing(
+        username="slabbedask",
+        item=borrowed_book_more_available,
+    )
+    slabbedask_borrowing.end_time = datetime.now() - timedelta(days=1)
+
+    borrowings = [
+        BookcaseItemBorrowing(username="user", item=borrowed_book_more_available),
+        BookcaseItemBorrowing(username="user", item=borrowed_book_no_more_available),
+        BookcaseItemBorrowing(username="user", item=borrowed_book_people_in_queue),
+        slabbedask_borrowing,
+    ]
+
+    queue = [
+        BookcaseItemBorrowingQueue(username="user", item=borrowed_book_people_in_queue),
+    ]
+
     with open(Path(__file__).parent.parent.parent / 'data' / 'iso639_1.csv') as f:
       reader = csv.reader(f)
       languages = [Language(name, code) for (code, name) in reader]
@@ -125,5 +224,9 @@ def seed_data(sql_session: Session = db.session):
     sql_session.add_all(bookcases)
     sql_session.add_all(shelfs)
     sql_session.add_all(languages)
+    sql_session.add_all(authors)
+    sql_session.add_all(books)
+    sql_session.add_all(borrowings)
+    sql_session.add_all(queue)
     sql_session.commit()
     print("Added test media types, bookcases and shelfs.")
\ No newline at end of file