Land of GiantsThe exploration and conquest of the Pacific Northwest is the dominant theme of Land of Giants, a book which (in the words of William O. Douglas) "gives one a sense of participation in moulding the manifest destiny of America." English and Spanish seadogs seeking a northwest passage to the Orient were the first comers; then, following Bering's explorations, Russian fur traders descended on the Aleutians. In turn, the Lewis and Clark expedition, the