When Madison Perkins brings her espresso cart back to her old high school for a twenty-year reunion, she expects awkward small talk-not murder. But when the prom queen drops dead beneath a toppled bookshelf and a Perk & Puzzle cup is found at the scene, Madison is thrust into a deadly game of high-school grudges, staged traps, and carefully planted evidence. With her indomitable friend Mavis at her side and detective Gabe Miller watching her back, Madison must brew up courage, sift through decades of secrets, and prove that a barista's instincts can be as sharp as any detective's. Back to the Grind is a witty, fast-paced cozy mystery steeped in small-town satire, coffee-fueled sleuthing, and a heroine who refuses to be framed-literally.