''Riotously funny, utterly enthralling...Dempsey's a hoot.''--''Minneapolis Star Tribune ''It began innocently enough, when two eccentric guests at L uke Dempsey's weekend home pointed out a small bird flitting through his garden. Dempsey, entranced, found himself falling head over heels. Before he knew it, he and his friends were off on an epic birding journey down the backroads of America, in search of the country's rarest and most beautiful birds. ''A Supremely Bad Idea ''is the hilarious story of their trip--what ''WildBird ''magazine calls ''as close as we have to Bill Bryson's ''A Walk in the Woods.''''