Whispering Nickel Idols is a fantasy novel by American writer Glen Cook, the eleventh book in his ongoing Garrett P.I.

Things seemed to be going pretty well for Garrett one morning until he finds a strange kid named Penny Dreadful hanging around his house, gets summoned to a meeting by Harvester Temisk, Chodo Contague's lawyer, and nearly has his door knocked down by an ugly thug wearing green plaid pants.

Garrett can only escape the warring mafia factions for so long, and eventually he is captured, poisoned, and blackmailed by one aspiring leader named Teacher White.

While he rests and recuperates at home, the Dead Man organizes efforts geared towards unraveling the mysteries of the Green Pants Gang, the criminal factions, and the spontaneous combustions.

With some clues from the Dead Man, Garrett, Morley, and company track down and capture Harvester Temisk, who had been hiding out with Chodo Contague.