User:SOTO/Forum Archive/Inclusion debates/@comment-45692830-20200723133026/@comment-43874324-20200723191235

I was referring to the notion of saying, from an in-universe perspective, that "the Thirteenth Doctor and Yaz were trapped inside a book called Knock! Knock! Who's There? joke book", which was the impression I was getting from one of Scrooge's initial replies. I apologise if I got the wrong end of the stick there.

But yes, "the joke book that they got trapped in" should definitely be regarded as an in-universe object (joke book, or something).

I'm afraid the books copyright page makes no mention of the title, just the usual DW copyrights. Looks like the cover title is all we have to go on.