Update app.py

app.py

@@ -153,7 +153,7 @@ with gr.Blocks(theme='freddyaboulton/dracula_revamped') as demo:
             question = gr.Textbox(label="Your question", placeholder="What do you want to ask about?")
             answer = gr.Textbox(label="LitBot Response", placeholder="LitBot will respond here...", interactive=False, lines=20)
             submit_button = gr.Button("Submit")
-            submit_button.click(fn=query_model, inputs=question+book, outputs=answer)
+            submit_button.click(fn=query_model, inputs=question and book, outputs=answer)
     
 
 # Launch the Gradio app to allow user interaction