In this first part of a special two-part series, Mary-Kate and Ashley are off to Florida on a summer getaway with a group of students from White Oak and Harrington to study marine mammals, scuba dive, and have fun in the sun. But when Mary-Kate gets lost in the cypress swamps, only Ashley can save her.

Shore Thing 2001, HarperEntertainment, New York, NY

ISBN-13: 9780061066573

Trade paperback

Shore Thing 2001, Turtleback Books

ISBN-13: 9780613439572

Turtleback School & Library edition