Christina, Grant, Mimi, and Papa go "All aboard!" the train Papa's borrowed train for a fast-adventure across America - and try to keep from being "derailed" by mysterious mishaps, spooky surprises, and - oh, it's so dark in here! - those treacherous tunnels! Look What's Inside 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, a scavenger hunt and activities. This Carole Marsh Mystery has Accelerated Reader Reading Levels, Lexile Measures, Fountas & Pinnell Guided Reading Levels and Developmental Reading Assessments Levels.