Poisoned Pins: A Claire Malloy Mystery (Claire Malloy Mysteries Book 8) by Joan Hess

Claire Malloy loves her life. But how did it go by so fast? A bookstore owner, part-time sleuth, and full-time single mother, Claire is about to turn the big four-oh! Good thing her teenage daughter, Caron, has just been recruited by the Kappa Theta Eta girls—whose sorority house is next door to the Malloys'—to be a consultant for the cosmetics empire My Beautiful Self, Inc. At the very least, Claire can get a little help with those fine lines around her eyes…but at what cost? Turns out there's a high price to pay to look one's best. After a series of dangerous and suspicious incidents, including a hit-and-run "accident" that kills a sorority sister, it becomes clear to Claire that the beauty business in Farberville, Arkansas, is getting pretty ugly—and with every new makeover another dark circle rises from beneath the surface….