"The Aldens are helping out at a harvest festival in a town at the foot of the Rocky Mountains. But something in the hills is scaring people away! Are the local rumors about a werewolf true?"--Back cover.
Learning about paleontology and fossil hunting under renowned scientist Dr. Iris Prez while attending summer camp in Colorado, the Aldens investigate an outbreak of strange events that local superstition attributes to a bigfoot creature roaming the valley.
When a professional hockey player comes to Greenfield with plans to build an ice skating rink, the Alden children suspect that someone in town wants to stop the project.