7 Best Books on Happiness You Can Read.

The Art of Happiness by Dalai Lama.

Stumbling on Happiness by Daniel Gilbert.

Solve for Happy by Mo Gawdat.

The Happiness Trap: How to Stop Struggling and Start Living: A Guide  to ACT by Russ Harris & Steven C. Hayes.

The Happiness Advantage by Shawn Achor.

The Happiness Project by Gretchen Rubin.

The Happiness Hypothesis by Jonathan Haidt.