Christina and Grant start in New Orleans. Their two new friends start at the headwaters of the Mississippi River in Minnesota. They planned to meet at the Gateway Arch in Saint Louis. But they didn't plan on getting involved in a very strange mystery which takes them over locks and dams, past Tom Sawyer's cave and past many other fascinating sights along the mighty Mississippi. Are they being followed? Tricked or trapped? Come along for the ride and see! The Mystery on the Mighty Mississippi 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 & Pinnell guided reading level.