Osborne, Mary Pope.

Dolphins at daybreak / by Mary Pope Osborne ; illustrated by Sal Murdocca. - New York : Random House, c1997. - 67 p. : ill. ; 20 cm. - The magic tree house series; #9 .

Their magic tree house takes Jack and Annie deep into the sea, where they meet up with dolphins, sharks, and octopi as they search for the answer to an ancient riddle.

ISBN: 0590706357 (pbk.)

LCCN: 96030943 /AC

Subjects--Topical Terms:
Marine animals
Submarines
Riddles
Magic
Tree houses

LC Class. No.: PZ7.O81167 / Do 1997

Dewey Class. No.: [Fic]