Book? [That catches his attention. Wait. Yes. There was a book. John was writing one, not that Sherlock read it much, it tended to butcher his work and his words but that was John.] There's only one book I know that you could be talking about and I never read that drivel. Merely cobbled together so the author could spend his money at the gambling den. Or such was the case in the glory days before the wife.

[The loathing in his tone was apparent. Ew. Wives.] I was merely testing. It's not every day you meet someone impersonating your friend, I was curious if you did your homework. Now I'm curious for many other reasons. [Namely the whole fictional thing.] Are you entirely sure you're not crazy? Delusions can be hard to see in yourself.