by THOMAS WILLIAMS
239 pages. Random House. $7.95.
Tsuga 's Children is a novel that was bound to be written in a time of lowered sights and the repackaging of conventional verities. Thomas Williams, who won the National Book Award in 1975 for The Hair of Harold Roux, now gives us a fantasy spun from the loose threads of The Lord of the Rings, The Whole Earth Catalogue, Carlos Castaneda and the Environmental Protection Agency. Set on a timeless, mythical Western frontier, the novel cultivates a modern delusion. As the author says, "It...