Minor correction: the book is Green Eggs and Ham and the character is Sam-I-am.

This was cute - I liked the interaction between Dean and John, especially, and it's great to see a moment that isn't so idyllic in the Winchester household. I know Dean's little and grown-up arguments don't make sense, but I do wish we as the audience had been given enough clues to figure out what they were arguing about.... Unless I'm just dense?