From Bad to Cursed (Bad Girls Don't Die series Book 2)

Alexis is the last girl you'd expect to sell her soul. She already has everything she needs--an adorable boyfriend, the perfect best friend, and a little sister who's finally recovering after being possessed by an evil spirit, then institutionalized. Alexis is thrilled when her sister joins a club; new friends are just what Kasey needs. It's strange, though, to see how fast the girls in The Sunshine Club go from dorky and antisocial to gorgeous and popular. After taking an oath to a seemingly benevolent spirit, a high school girl finds herself changing in frightening ways