In this clever if at times implausible page-turner from Cameron (Just One Look), Heather Quinn, a Wall Street wheeler-dealer turned stay-at-home mom, is cautiously optimistic that all the years of strategizing, volunteering, and sucking up to the right people will vault her academically gifted if socially anxious 13-year-old daughter, Violet, a Manhattan private school student, into an Ivy-feeding boarding school. Then the unthinkable happens. Following a dance at an ultra-exclusive East Side club, a photo of Violet apparently vaping there surfaces on Instagram, along with vicious, viral posts on the anonymous UrbanMyth message board accusing the girl of dealing drugs to her schoolmates. With Violet subsequently threatened with expulsion, Heather turns detective to try to determine who set Violet up, an effort that puts her on a collision course with two rival momzillas—a driven hedge fund managing director and a snobby blue-blood socialite—especially once her digging starts to unearth secrets including adultery and blackmail. Fast-paced intrigue spiked with social satire ensues, until the disappointing deus ex machina denouement. Nevertheless, those inclined toward a fizzy cocktail of suspense and schadenfreude should enjoy. Agent: Alexa Stark, Writers House. (May)