Getting ready for monster book...

Are the PQ bosses in the book? and if so how are higher levels supposed to get them?

The PQ monsters are in the book (as shown by Isaac's screenie of King Slime and Alishar among others). In kMS, I believe, you could trade in the Maple Leaves for the various cards. Papulatus was...10k leaves per card, IIRC based on what Isaac said. The leaves had around a 95% droprate there as well, so you could find a lot of them easily.