The Seven Principles for Making Marriage Work: A Practical Guide from the Country's Foremost Relationship Expert

by John M. Gottman et al.

http://amzn.com/0609805797

The Relationship Cure: A 5 Step Guide to Strengthening Your Marriage, Family, and Friendships

by John Gottman

http://amzn.com/0609809539

What Makes Love Last?: How to Build Trust and Avoid Betrayal

by John Gottman Ph.D. et al.

http://amzn.com/1451608489

Hold Me Tight: Seven Conversations for a Lifetime of Love

by Sue Johnson

http://amzn.com/031611300X

The Mindful Way Through Depression: Freeing Yourself from Chronic Unhappiness (Book & CD)

by Mark Williams et al.

http://amzn.com/1593851286

The How of Happiness: A New Approach to Getting the Life You Want

by Sonja Lyubomirsky

http://www.amazon.ca/dp/0143114956

Mind Over Mood: Change How You Feel by Changing the Way You Think

by Dennis Greenberger et al.

http://amzn.com/0898621283