I dont remember Tara being in the first book (the only one I read lol) but I could be wrong.
She isn't in the first book - which is why, in my post, I mentioned that she has a much smaller role in the books than she does in the show. Sookie still considers Tara to be her best friend in the books, like she does in the show, but her role is very minor and she only appears when Sookie's trying to remember that she has somewhat of a normal life, which isn't very often.