Imaginary Girls — Nova Ren Suma

Ruby said I'd never drown.
I didn't. But someone else did.

Chloe's older sister, Ruby, is the girl everyone looks to and longs for. After a night with Ruby's friends goes horribly wrong and Chloe discovers a dead body floating in the reservoir, Chloe is sent away -- away from home, away from Ruby. But Ruby will do anything to get her sister back, and when Chloe returns home at last, she finds a shocking surprise. As Chloe flirts with the truth that Ruby has hidden deeply away, she finds herself walking a precarious and deadly tightrope between what's real and what lurks beneath the surface.