Osborne, Mary Pope. creator Murdocca, Sal ill. text New York Random House c1997 monographic eng 67 p. : ill. ; 20 cm. 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. by Mary Pope Osborne ; illustrated by Sal Murdocca. "A first stepping stone book." Marine animals Fiction Submarines (Ships) Fiction Riddles Fiction Magic Fiction Tree houses Fiction PZ7.O81167 Do 1997 [Fic] Osborne, Mary Pope 067988338X 0679983384 (glb) 96030943 http://www.loc.gov/catdir/bios/random057/96030943.html http://www.loc.gov/catdir/description/random047/96030943.html http://www.loc.gov/catdir/bios/random057/96030943.html http://www.loc.gov/catdir/description/random047/96030943.html DLC 020702 20190501190605.0 4471725