Not Just a Witch by Eva Ibbotson: Heckie can turn anyone into an animal and Dora can turn anyone into stone. The two are best friends until a falling-out over a hat. They end up each getting duped by a furrier looking for a cheap and easy way to get exotic pelts, but join together to make everything right in the end. Not her best effort, but a cute story nonetheless.
Which Witch? by Eva Ibbotson. Tired of waiting for the next dark wizard to take his place, Arriman the Awful decides to marry. He auditions all the local witches with a contest--whoever performs the darkest magic wins. Belladonna desperately wants to win, but flowers and fluffy bunny rabbits tend to spring up all around her and she finds dark magic impossible to perform. With the help of an orphan named Terrence, she comes up with a plan. This one is really cute and charming. Terrence is adorable, and Belladonna's inadvertent white magic is very funny. Arriman is a hoot. This is one of my favorite Ibbotsons, and that's really saying something.
Books 2 and 3 in the Percy Jackson and the Olympians series. The first is The Lightning Thief (the author is Rick Riordan), and 2 and 3 are NOT a disappointment. If anything, they're even better than the first. I really don't want to say too much and give anything away, so go read them!
I also read Plum Lucky by Janet Evanovich. Everyone says the between-the-numbers Plum books are not as good, and they're right. But this was still fun. Grandma Mazur at the slots, Lula modeling underwear, a guy who thinks he's a leprechaun...what's not to like? And it's a fun diversion while waiting for Fearless Fourteen to come out.