I guess I’m just not sold on the idea that PP is involved with the book – I feel like that reveal would be left for later, not season 3. Unless I missed A and E saying it would be revealed this season? I don’t think EVERYONE is working for PP, just GOAT.
The way I’m looking at it, the book was a vital step in the plan that allowed PP to achieve his endgame – getting Henry.
If Henry never got the book, he’d never have figured out the truth, he’d never have gone to get Emma, the Curse never would have been broken, and PP’s employees GOAT wouldn’t have been able to get into SB in order to kidnap Henry for him. So I reckon that book has to have been created and planted by someone who wanted PP’s endgame to be achieved.