Text ( visual ) : unmediated Shadow of the shark / by Mary Pope Osborne ; illustrated by Sal Murdocca. -- : pbk. -- New York : Random House , c2015. -- 130 p. : ill. ; 20 cm. -- (Magic tree house Merlin missions ; #25 ; A stepping stone book). -- ISBN 9780553510843 ; (BB23635104) ; https://ci.nii.ac.jp/ncid/BB23635104 Author Heading(s): Osborne, Mary Pope ; Murdocca, Sal. -- Classification(s): DC23 : 813.6. -- Subject Heading(s): LCSH : Mexico -- Juvenile fiction ; LCSH : Children's stories