Osborne, Mary Pope. <br/><br/>
Vacation under the volcano / 
by Mary Pope Osborne; illustrated by Sal Murdocca. 
 - New York, NY :  Random House,  1998. 
 - p.  cm. 
 - Magic tree house; #13 .
<br/><br/> Summary: Their magic tree house takes Jack and Annie back to Pompeii just as Vesuvius is about to erupt, and they must find a Roman scroll before everything is covered with burning ash. 
<br/><br/><label>ISBN: </label>0-679-99050-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vesuvius (Italy)--Fiction<br/>Pompeii (Extinct city)--Fiction<br/>Time travel--Fiction