The Clinic By Cate Quinn

Meg is a top poker player, undercover, hunting down cheaters, but she can hardly get out of bed without a stack of pills and alcohol. She is convinced that emotions cloud her judgment, so she drowns them and covers her eyes from the world. Then, under suspicious circumstances, her estranged sister Haley dies while undergoing treatment for addiction. But it wasn’t always like this. She once meant everything to her. Meg, firmly convinced that her sister did not take her own life, agrees to treatment at the prestigious clinic where Haley was treated. By hunting down her sister’s killer, she begins a battle with her own addiction, riddled with ghosts and childhood traumas…