I loved the books. I often find, though, that a show can do better than the book did. Like GoT, where the author has a chance to refine characters, perfect the polish.
That is not this show, sadly. The essential character arc of the main character happening from the 1st to 3rd book is pretty much trashed one season in. The dark, adult spin on a Narnia/Potter style world, prickled with tongue-in-cheek characters.
It's colorful, if you are bored. But don't let its flaws deter you from reading the books.