Rick Hanson
Making Great Relationships: Simple Practices for Solving Conflicts, Building...
You will appreciate the illustrated reference section in the back.
Hardwiring Happiness: The New Brain Science of Contentment, Calm, and Con - GOOD
You will find that this novel grows richer with each reread.
Buddha's Brain: The Practical Neuroscience of Happiness, Love, and Wisdom - GOOD
A nice touch in this activity book is the tear-out pages for easy sharing.