Update app.py

app.py

@@ -153,7 +153,7 @@ with gr.Blocks(theme='JohnSmith9982/small_and_pretty') as demo:
                 ["The Great Gatsby", "The Crucible", "Fahrenheit 451", "Of Mice and Men", "To Kill a Mockingbird", "Romeo and Juliet", "The Catcher in the Rye", "Pride and Prejudice", "Lord of the Flies", "Hamlet"],
                 label = "Choose a book!",
                 interactive = True )
-            question = "In {book}" and gr.Textbox(label="Your question", placeholder="What do you want to ask about?")
+            question = f"In {book}" and gr.Textbox(label="Your question", placeholder="What do you want to ask about?")
             gr.Markdown(space)
             submit_button = gr.Button("Submit")
             answer = gr.Textbox(label="LitBot Response", placeholder="LitBot will respond here...", interactive=False, lines=30)