Shades of Blue by Karen Kingsbury

Brad Cutler, twenty-eight, is a rising star at his New York ad agency, about to marry the girl of his dreams. Anyone would agree he has it all … a great career, a beautiful and loving fiancée, and a fairy tale life ahead of him—when memories of a high school girlfriend begin to torment him. Lost innocence and one very difficult choice flood his conscience, and he is no longer sure what the future will bring except for this: He must find his old love and make amends. Haunted by the past and confused about the future, he turns to God seeking forgiveness and redemption. Three people must work through the repercussions of a decision made long ago before any of them can look toward a new future.