Wake. Amanda Hocking. 2012.

Strangers in town for the summer, Penn, Thea and Lexi have caught everyone’s attention, including the eye of practical Harper. But it’s her sister, Gemma, they’ve chosen. Sixteen-year-old Gemma seems to have it all - carefree, pretty and falling in love with the boy next door. But her greatest passion is the water. She craves solitary late-night  swims under the stars, where she can belong to the sea. But lately she’s had company.

Penn, Thea and Lexi spend their nights dancing and partying on the cove, and one night Gemma joins them. She wakes, groggy, on the beach the next morning  and knows something has changed. Suddenly Gemma is stronger, faster and more beautiful than ever. And as she discovers her new mythical powers, Gemma is forced to choose between staying with those she loves - or entering a dark world brimming with unimaginable secrets.