Deep in the heart of the city. . .Mac's favorite glass monkey is missing. Who would take a glass monkey? And why?

This sounds like a case for the High-Rise Private Eyes--Case #001, to be exact, "The Case of the Missing Monkey"

Because no mystery is too mysterious, no puzzle to puzzling, no crime too criminal, no trouble too troubling for ace detectives and very best friends Bunny Brown and Jack Jones.