Here are some of the books I recommend.
We Love each other but, by Dr. Ellen Wachtel
How to stubbornly refuse to make yourself miserable about anything by Dr. Alber Ellis, Ph.D
The seven principles for making marriage work by Dr. John M. Gottman, PH.D
The Worry Cure
THE CHILD AND FAMILY INSTITUTE
WWW.CHILD FAMILY INSTITUTE .COM
ANXIETY AND DEPRESSION ASSOCIATION OF AMERICA