Update app.py

app.py

@@ -145,7 +145,7 @@ with gr.Blocks(theme='JohnSmith9982/small_and_pretty') as demo:
        # with gr.Column():
             gr.Markdown(topics)  # Show the topics on the left side
             gr.Markdown(books)
-            gr.Markdown(book2)
+            gr.Markdown(books2)
     with gr.Row():
         with gr.Column():
             question = gr.Textbox(label="Your question", placeholder="What do you want to ask about?")