Well, although the writers parallel much of SB activity with the past stories of FTL, they do not coincide probably for Henry or anyone else reading the book, all the book really does is reveal who the characters are and maybe give some clues to possibilities besides identities, like the skeleton keys Regina has. Henry still had to put two and two together, because the skeleton keys were not part of the present SB story as far as he knew, he saw or read about them and decided to try them. He’s looking for clues and answers, but again the SB present is different from the FT past. It only coincides for us, the viewers. 🙂