Addison Cooke And The Treasure Of The Incas by Donald W. Stokes

A resourceful young archaeologist follows cryptic clues from his father's papers to the Andes, where he must decode ancient puzzles, brave hidden traps and hostile treasure hunters, and unravel a centuries-old mystery; racing against a ruthless rival group, he forms unexpected alliances and learns hard lessons about trust, family and the true value of the past.