The spellbinding account of a tough journey into Ecuador's Llanganati mountains in search of buried Spanish gold -- the legendary lost ransom of Atahualpa. Honigsbaum, his curiosity piqued, searched archives, meets up with modern treasure hunters and has a look for himself. The mission may be quixotic but it's a fine tale full of suspense. This is Mark Honigsbaum's second book set in the Andes, the first on the trail of the Victorian botanist Richard Spruce and the Cinchona (The Fever Trail).  (AND51, $16.00)