Burn for Burn by Jenny Han (author) and Siobhan Vivian (author)

Postcard perfect Jar Island is home to charming tourist shops, pristine beaches, amazing seafront homes – and three girls quietly plotting revenge. Kat is tired of having people lie to her, and being stabbed in the back by her secret crush and ex-best friend. She’d like them to feel as awful as they’ve made her feel. Lillia is ready to stop pretending her senior year is going to be so great. She’s starting to see that her ‘friends’ are nothing but the entitled brats she has always denied they were. Maybe someone should show them that bad behaviour has consequences… Mary has just gotten back to Jar Island, still haunted by a trauma from years ago. She means to put it behind her, but when she sees Reeve, the old pain flares up again. But she can’t get revenge alone… With an unlikely alliance in place, these girls will show Jar Island that revenge is just the beginning…