Gone Girl by Gillian Flynn (2012). A narcissist young woman vanishes after 5 years of marriage. A detailed (OC) diary is left behind calling into the question of 'did she run away, or was she murdered'. Tense vivid prose and leaves one guessing until the final pages.
Bad Girls by Rebecca Chance. The story of four people forced to go to rehab to save their career, their image or their fortune, and in their thirty days in Cascabel Clinic, their lives will be changed forever. But one of them is in terrible danger... #RebeccaChance #BadGirls #bonkbuster