I am going to ask ChatGPT and Copilot the same thing and see what answers I get. I sat outside Blackwell’s bookshop in Oxford today and thought how wonderful it would be if my book was in the window.

So this will be my prompt; I would like to write a successful book that gets displayed in Blackwell’s window. What should I write a book about? What should the title of my book be?

This was the response when I asked Copilot on 10th June 2025

I notice I didn’t actually get a book title.

This was the response when I asked ChatGPT on 10th June 2025

Both Copilot and ChatGPT knew that Blackwell’s is splendid. I got more assistance towards my goal from ChatGPT.