Christina, Grant, Mimi and Papa snowmobile into Yellowstone National Park to encounter mud pots, geysers, bison, beauty, bears, volcanic action, and a mystery of historic proportions! This mystery incorporates history, geography, culture and cliffhanger chapters that keep kids begging for more! The book includes SAT words, educational facts, fun and humor, built-in book club and activities. This Carole Marsh Mystery has an Accelerated Reader quiz, a Lexile Level, and a Fountas & Pinnell guided reading level. Paperback. 160 pages, ages 7-14.