Skurzynski, Gloria. <br/><br/>
Over the edge :  a mystery in Grand Canyon National Park  
Gloria Skurzynski and Alane Ferguson. 
 - 1st digest ed. 
 - Washington, D.C. :  National Geographic Society,  2008, c2002. 
 - 158 p. :  ill., map ;  20 cm. 
 - Mysteries in our national parks.  #5 .
 - Skurzynski, Gloria.  Mysteries in our national parks. .
<br/><br/> While she studies condors in the Grand Canyon a scientist's life is threatened, and the strange, hostile, teenage computer whiz in her family's foster care might be involved. 
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<br/><br/><label>ISBN: </label>9781426301773 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Condors--Fiction.<br/>Endangered species--Fiction.<br/>Internet--Fiction.<br/>Foster home care--Fiction.<br/>National parks and reserves--Fiction.<br/>Mystery and detective stories.
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Grand Canyon National Park (Ariz.)--Fiction.<br/>Arizona--Fiction.