Osborne, Mary Pope. <br/><br/>
Dark day in the deep sea / 
by Mary Pope Osborne ; illustrated by Sal Murdocca. 
 - 1st ed. 
 - New York :  Random House,  c2008. 
 - 106 p. :  ill. ;  22 cm. 
 - Magic treehouse ;  #39 .
 - Osborne, Mary Pope.  Magic tree house series ;  #39. .
<br/><br/> "A Merlin mission."  "A Stepping Stone book." 
<br/><br/> Horn Book, October 2008 
<br/><br/> Eight-year-old Jack and his seven-year-old sister, Annie, learn about the ocean, solve the mystery of its fabled sea monster, and gain compassion for their fellow creatures after joining a group of nineteenth-century explorers aboard the H.M.S. "Challenger." 
<br/><br/> 3.8  3-6  Follett Library Resources 
<br/><br/><label>ISBN: </label>0375937315 
<br/><br/><label>LCCN: </label>2007029717 
<br/><br/><label>Subjects--Corporate Names: </label><br/>Challenger (Ship : 1872-1876)--Fiction.
<br/><br/><label>Subjects--Topical Terms: </label><br/>Oceanography--Fiction.<br/>Compassion--Fiction.<br/>Time travel--Fiction.<br/>Magic--Fiction.<br/>Tree houses--Fiction.<br/>Siblings--Fiction.
<br/><br/><label>LC Class. No.: </label>PZ7.O81167  / Dar 2008 
<br/><br/><label>Dewey Class. No.: </label>[Fic]