How fast can some dolphins swim? What is the biggest shark? Why do sharks attack? Find out the answers to these questions and more in this Magic Tree House Research Guide! Includes an illustrated gallery of dolphins and sharks, information on the ocean, dolphin communication, how sharks hunt for food, ocean exploration, and lots more! A Stepping Stone BookOsborne, Mary Pope is the author of 'Dolphins and Sharks A Nonfiction Companion to Dolphins at Daybreak', published 2003 under ISBN 9780375823770 and ISBN 0375823778.