Sweep #1: Book of Shadows
by Cate Tiernan

Morgan is a normal high school girl, and she has grown used to living in the shadow of her gorgeous, talented best friend Bree. But then Cal Blaire comes to Widow's Vale High. Cal finds instant popularity, and Morgan begins to fall for him, as does her best friend Bree.
Then Cal invites a bunch of kids to a party, which turns out to be a celebration of the Wiccan holiday Sabbat. Morgan is completely taken in by this new religion, and finds that strange things are happening to her, magykal things.
This was a great book. Very short, but with good characters and a more realistic view of adolescence than you often find. It also offers a realistic and non-discriminatory view of Wicca. I finished it wanting to know what happens next.
Four out of five stars. Recommended for teenage girls 12+.