A boy finds a mysterious treasure in a junkpile and creates a monster to guard it.

Munching Machines enter a huge junkyard and consume all of the waste, then smooth the ground, plant trees and flowers, create a lake and playground, and much more.

"Colin and Nevaeh are great at finding things. After all, they found each other and became best friends--even though their parents are business rivals. They also found hidden boxes of secret letters, which led them to unravel mysteries about kids from the 1970s. But when they started Mystery Solvers Inc., they didn't expect to be asked to find a ghost. Ree recruits them to investigate a series of old, spooky photos left behind in her family's new...