Osborne, Mary Pope <br/><br/>
Magic tree house Diving with dolphins  eng 

 - London  Red fox  2009 
 - 68 
 - Magic tree house series .
<br/><br/> Diving deep underwater in a mini-sub, they have to tackle a giant octopus and escape from a scary shark. The dolphins seem very friendly, but will they help Jack and Annie find the answer to the puzzle 
<br/><br/><label>ISBN: </label>9781862305731 
<br/><br/><label>Dewey Class. No.: </label>823.912  / OSB-M