When four real kids visit the National Underground Railroad Freedom Center in Philadelphia, they learn the history, geography, and secrets of the Underground Railroad as they race to find stolen quilts before the grand opening Renaissance Learning, Inc now has Accelerated Reader quizzes for all of the Carole Marsh Mysteries To visit their website, click here. Want a sneak preview of this great mystery? Click HERE to download the first three chapters (approximately 535 KB) The Mystery on the Underground Railroad is recommended by Sylvan Learning's Book Adventure reading program. Book Adventure is a FREE reading motivation program for children in grades K-8. Sylvan Learning is the leading provider of tutoring and supplemental education services to students of all ages. Each 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 also has an Accelerated Reader quiz, a Lexile Level, and a Fountas and Pinnell guided reading level.