I read this on a whim the other day, and I have to say that I really enjoyed it. L.J. Smith, best known for "The Vampire Diaries", crafts a YA Witch novel that doesn't deal with human sacrifice, unlimited evil, or any of the other stereotypes that are usually found in this genre.
Cassie, a hereditary witch with no knowledge of her powers, runs afoul of "The Club", a strange group of young men and women at her new school who seem to have the run of the town. After a few false starts, Cassie is welcomed into the club for her magical abilities, despite the fact that she's not really sure how to control them.
I also watched the pilot of the T.V. series based on this book, and I was surprised at how much they changed. Definitely a case of the book being better than the adaptation, but the show was still fun, too (if a bit more flashy than "Initiation").
If you liked Meg Cabot's "Jinx" or Cate Tiernan's novels, this would be a good one to pick up.