I don't really think this is a problem though.
A lot of the books don't really contain a recipe , but just a vague description of how to create certain items. If it would unlock all recipes it would be a nightmare!
Think about it this way: You can boost every weapon or piece of armour with a tormented soul, so reading that book would make you unlock 40 recipes.
Yeah, we're not talking about that, though. This is a book showing how to make pizza, or poison, etc (for example) that isn't translating into a recipe. Very specific things. Other books that do the same seem to get entered into the log. It's like some books are just missing the proper flag to trigger that transfer.