The Knaveheart's Curse (Vampire Island)

Being a vegan vampire with no social graces hasn't exactly made Maddy popular with other eleven-year-olds. But the day she befriends Dakota Underhill changes everything, even if Dakota only promises to be her friend for . . . well, for that day. Because when the leader of the Knavehearts - the most vicious of the Old World vampires - comes to town, Maddy realizes she's going to need help. She's not strong enough to face the villain alone, and there's something special about Dakota that might make her the perfect person to team up with. . . .