David is reading "A Rare Sophistication", a book Dan Levy created/made up. It describes him perfectly, is overly pretentious with minimalist type in greyscale, and he doesn't finish the book in the episode.
Roland asks Johnny if his suitcase is a tickle trunk. Possibly a reference to one of Canada's favorite children's shows Mr. Dressup (1967). He had a large trunk named the "Tickle Trunk".