For the most part they are. Some of the books need updating on a bit of the information but overall they are pretty good and if anyone doesnt know a lot about rats and buys one of these books they'd get a pretty good idea of rats. Some of them like debbies even has a few rattie recipies for meals and treats, also a monthly routine of foods to feed them and foods not to eat. Has tips on keeping them stimulated, their history, health and what they are prone to etc, each book is a bit different. Debbie's book is the most accurate of them all but thats no surprise lol