Death in Downline by Maria Abrams

Drew thought she was destined to rise above her small New Jersey hometown and make it as a serious journalist in New York City. But now she's back in Clearfield, pushing thirty, newly single, and living with her father.
A multi-level marketing scheme called LuminUS has taken the ladies of Clearfield by storm. With nothing left to lose, Drew gets sucked into this glamorous world of downlines, sales parties, and girls' trips.
But when a LuminUS distributor dies under mysterious circumstances, can Drew uncover the dark secret at the heart of the organization—and save her best friend—before it’s too late?
Laugh-out-loud funny and a pitch-perfect skewering of pyramid schemes, Death in the Downline is a page-turner that will have readers nodding in recognition and cheering for Drew until the cathartic conclusion.