Osborne, Mary Pope <br/><br/>
dolphins at daybreak 

 - New York :   Scholastic,   1997 
 - 67 p. :  ill.  
 - The magic tree house series ;  #9 .
<br/><br/> 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. 
<br/><br/><label>ISBN: </label>0590706357 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marine animals--Juvenile fiction<br/>Submarines (Ships)--Juvenile fiction<br/>Riddles--Juvenile fiction<br/>Magic--Juvenile fiction<br/>Tree houses--Juvenile fiction<br/>Dopohins--Juvenile fiction