Connecting Brain Research and Effective Teaching:  Mariale M. Hardiman 

Happier:  Tal Ben-Shahhar

Laughing Matters:  Susan Stephenson, Paul Thibault

Learned Optimism:  Martin E.P. Seligman

 Play: Stuart Brown 

Positivity:  Barbara Fredrickson 

Spark: John J. Ratey 

The Optimistic Child: Martin E.P. Seligman 

The Playful Brain: Sergio Pellis and Vivien Pellis 

The Psychology of Humor: Rod Martin

This is Your Brain on Joy:  Dr. Earl Henslin