Collins, Pat <br/><br/>
The riddle of redstone ruins 

 - St. Leonards, Australia, Katonah, N.Y.  Horwitz Martin Education ; Distributed in United States of America by Richard C. Owen Publishers  2000 
 - 32 
 - Tristars B .
<br/><br/> "After accidentally finding the first of many ancient clues, a group of children race to work out a thousand-year-old puzzle. But there are some hidden traps - and the children must take care to read the clues very carefully!" 
<br/><br/><label>ISBN: </label>9781572744783 
<br/><br/><label>Dewey Class. No.: </label>823  / COL-R