WESTWARD THE SUN (287 pp.)Geoffrey CotterellLippincott ($3.50).
British readers take to 33-year-old Geoffrey Cotterell's novels as naturally as U.S. movie addicts to popcorn. His five novels have sold a tidy 80,000 copies, and four of them have been British book-club choices. Well buttered with stock situations and salted with everyday speech, the Cotterell brand of popcorn is easy to munch but slim fare as a literary meal. Strait and Narrow, his first novel to be published in the U.S., was about a go-getting young Briton whose law career rose almost as fast as his...