Need a few good reads on forgiveness? Here are some options...
Mending the Soul, Steve Tracy: Though specifically targeted to those who have experienced abuse, Dr. Tracy's work on forgiveness and healing is applicable to everyone.
What's So Amazing About Grace?, Philip Yancey: Yancey's book provides the beginnings of a theological understanding of forgiveness while including some practical steps and and positive consequences of forgiving.
Helping People Forgive, David W. Augsberger: Augsberger's book explores the emotional and spiritual side of forgiveness. It's a great read!