Book excerpt: ALL I REALLY NEED TO KNOW ABOUT MURDER I LEARNED IN NASHVILLE The bestselling toast of Tennessee, author Robert Jefferson Reed has made big bucks with his little book of folksy homilies like "Never go to bed angry" and "Eat your vegetables." He should have included "Don't commit murder." For when Reed's wife hires P.I. Harry James Denton to catch her hubby in a tryst with a sexy secretary, Harry finds the author of Life's Little Maintenance Manual strangled and drowned in his own hot tub. Caught at the scene of the crime, Harry is pegged as the prime suspect and must work double duty to avoid the specter of prison--and to pluck a murderer out of a dead man's tangled past. . . . From the Paperback edition.