Some books to consider if you suspect a sexual addiction are:
Out of the Shadows by Patrick Carnes
In the Shadows of the Net by Patrick Carnes
Dr. Carnes is the leading expert in the field of dealing with sexual addictions. He is currently the executive director of Pine Grove Treatment center in Hattiesburg, Mississippi.
Other books used by colleagues include:
Getting the Love You Want by Harville Hendricks
Private Lies: Infidelity and the Betrayal of Intimacy by Frank Pittman
Best Regards,
Jeff Murrah