Marilou is Everywhere by Sarah Elaine Smith
Consumed by the longing for a different life, a teenager flees her family and carefully slips into another — replacing a girl whose own sudden disappearance still haunts the town.
Family of Origin by CJ Hauser
When Nolan Grey receives news that his father, a once-prominent biologist, has drowned off Leap’s Island, he calls on Elsa, his estranged, older half-sister, to help pick up the pieces. This, despite the fact that it was he and Elsa who broke the family in the first place. The Greys have been avoiding each other for a dozen years.