Teen Titans: Starfire — Kami Garcia

Kori Anders's summer job at a ritzy Santa Monica beach club is fun, but she doesn't care about keeping up with the current trends, and she's not interested in rushing around to all the parties. She'd rather explore her inexplicable draw to the stars or hang out with her new friend, Victor Stone.Her sister, Kira, on the other hand, is the most popular girl around. With the hottest clothes, an even hotter boyfriend (the Tate Fairweather), and a take-no-prisoners attitude, she's Kori's opposite in every way. Their summer heats up when Tate's uncle asks the girls to participate in an EDS study his pharmaceutical company is running. During treatment, Kori develops some strange powers she never had before…and she might not be the only one.Can Kori persuade her sister to trust her before it's too late? And when a carload of teens with their own powers comes looking for her to warn her about a creepy stalker, she'll learn that trust is a two-way street!