Yes, yes it does. She dedicates the book to Heinlein who introduced her to Jerome in Have Spacesuit, Will Travel. It has a tremendous amount to do with Three Men in a Boat.
it is silly but at the moment (60% done) i'm struggling. I am annoyed by the characters, their repetitive actions and weird behaviour. I feel like there is no progress and I'm starting to not care anymore...not good. Besides, this whole time travel stuff is starting to give me a headache.