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.
Last edited by Styno; 02/11/15 11:59 AM.