A trip to the beach starts out as fun until best-friends Leah Criss, Sara Cross, and Aimee Applesauce begin to get clues to a mystery- from a shark! Is Dad playing a trick on them? Who is the pretty girl? The surfer? Is the lifeguard in on the practical joke? Or is it no joke at all? Put on your swimsuit and join the girls as they try to solve the puzzle of the Shark Surfer Girl! 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.