Book excerpt: In Joan Johnston's fan-favorite story, love conquers all Previously published in December 1994 as The Headstrong Bride Callen has no idea why everyone thinks rancher Sam Longstreet is no good. There isn't aman in all of Texas as sexy, kind and thoughtful as her husband-to-be. Surely marriagewill soften up his rough edges. Sam has planned the perfect revenge against his enemy: to woo and wed the man's daughter.And he knows just how to make Callen Whitelaw fall in love with him. The only problem is, Sam never counted on loving Callen back…