Actually, it's been confirmed that August didn't write The Book and that it was Henry that he called in The Return. I don't have a direct source for the former (its out there I promise), but Jane Espenson confirmed the later on her Twitter account. I do however really like your speculation about the book having been created with the help of the faries information-network. It makes some sense to me that whoever did write the book had to get all those stories somehow, quickly enough anyway.
Thanks for the info. I knew the first one since I read the interview, but I didn't know the second one. Hmm, well, once again Jane Espenson is the bane of my existence xD Not really, but IDK, the writers all do irritate me sometimes with their fallible logic from script to script (not the overall storyarc). My reason for this one is that, realistically (and yes, I get that we're supposed to suspend our belief), it doesn't make sense for him to have called a kid without saying anything other than something about "accelerating the plan." Regina could have easily picked up. I assumed that's why they made it a point for Henry to get the walkie talkies for himself and Emma. Why backtrack on that and make it possible for anyone to just call Henry up, state his business and hang up? It just feels like poor writing :/ I think they could have done something else if it was intended for the call to have gone through to Henry. I understand the point of trying to be mysterious and deceptive, but if they're going to show Henry in the next scene and then even confirm it to fans later, then there's really not any point of having the phone call scene in the first place.