Christina, Grant, Mimi and Papa "head 'em out!" on a real covered wagon trek across the prairie, encountering adventure much as the pioneers of yore, and a mystery that you could say leaves Grant "upchucking!" LOOK what's in this mystery - people, places, history, and more! This mystery incorporates history, geography, culture and cliffhanger chapters that keep kids begging for more! Each mystery includes SAT words, educational facts, fun and humor, Built-In Book Club and activities. Each Carole Marsh Mystery will have an Accelerated Reader quiz, a Lexile Level, and a Fountas & Pinnell guided reading level.