The names of the books aren't very important. They come in three levels, and can get you all the way to level 10. You can buy handiness, logic, gardening, charisma, inventing, and cooking books. Purchase recipes and fish bait as well. There are books for the world adventures skills too, and like someone said they can be bought at the consignment shop sometimes. In general I shy away from books as the best practice often comes from doing. When you actually perform the tasks, like cook a dish, or do some gardening, you're working toward challenges.