The Case of the Sleepy Sloth — Cynthia Rylant

RamÃ"n's lawn chair has disappeared. It's only a cheap plastic chair, but it's RamÃ"n's favorite chair, and he wants it back. Who (or what) would take a lawn chair? When (and how) did it disappear?

This sounds like a case for the High-Rise Private Eyes -- Case #005, to be exact, the case of the Sleepy Sloth. Because no mystery is too mysterious, no puzzle too puzzling, no crime too criminal, no trouble too troubling for ace detectives and very best friends Bunny Brown and Jack Jones.