A jaded private investigator teams up with her 12-year-old kid detective self to solve a mystery in The Grown-Up Detective Agency, a lovely bit of free interactive fiction. Bell Park doesn’t know how or why her perfectly precocious child self is here, now, but who better to help crack a case involving her former childhood best friend? And who better to offer fresh perspective on her adult life? It’s a funny little buddy cop story, and it made my morning.