The fourth Nick Madrid book finds the self-deprecating, yoga-loving British journalist in Great Britain's West Country, where the discovery of King Arthur's grave results in commercial fanfare -- Camelot casinos, theme parks and banquets abound. Madrid and friend investigate the site and find a series of murders, a mystery heightened by a reappearing man on a white horse.  (GBR649, $14.00)

A Nick Madrid Mystery