Puzzle: Book Wyrms 1000pc

"Stop horsing around, Zaza!" Study begins early in a dragon's life. Magic, History, Alchemy, and How to Char a Sheep are all important subjects. So these four are pulling a late-night cram session on a cold winter night. Of course, group projects always have the one goof-off. I'm sure the rest of the group can keep Zaza in line, and hopefully, they won't be too tired for their exams!