Poor Man’s Wealth by Rod Usher Fourth Estate, 2011, 323 pages, $27.99 Rod Usher’s third novel begins with two epigraphs. The first is a quotation from Quadrant: Simon Caterson on hoaxes. The second is by Sir Philip Sidney, on sleep, the “poor man’s wealth” of the book’s title. The main, but not the only, hoax in the story concerns sleep. We are in the dusty village of Higot, in a remote area of a country very like Spain, and the period is probably about forty or fifty years ago. Higot, never prosperous, is in decline. The bus service to its…