<p>Part I. Perspectives on Friendship and Happiness.- Chapter 1. Friendship and Happiness from a Philosophical Perpective; Sandra Lynch.- Chapter 2. Friendship and Happiness from a Sociological Perspective; Silvana Greco, Mary Holmes and Jordan McKenzie.- Chapter 3. Friends and Happiness: An Evolutionary Perspective on Friendship; David Lewis, Laith Al-Shaway, Eric M. Russell and David M. Buss.- Chapter 4. Friendship and Happiness: A Bidirectional Dynamic Process; Lina María Saldarriaga, William Bukowski and Carolina Greco.- Part II. Friendship and Happiness across the Lifespan: Reviews of the Literature.- Chapter 5. Children's Friendship and Positive Well-Being; Mark Holder and Ben Coleman.- Chapter 6. Friendship and Happiness in Adolescence; Catherine L. Bagwell, Karen P. Kochel and Michelle E. Schmidt.- Chapter 7. Friendship and Happiness among Young Adults; Melikşah Demir, Haley Orthel, Metin Özdemir and Sevgi Özdemir.- Chapter 8. Friendship and Happiness among Middle-Aged Adults;Katherine L. Fiori and Christy A. Denckla.- Chapter 9. Friendship and Happiness in the Third Age; Rebecca Adams and Emily M. Taylor.- Chapter 10. Cross-Sex Friendship and Happiness; Amanda Procsal, Melikşah Demir, Aysun Doğan, Ayça Özen and Nebi Sümer.- Chapter 11. Social Media, Friendship and Happiness in the Millennial Generation; Adriana M. Manago and Lanen Vaughn.- Part III. Friendship and Happiness across Cultures.- Chapter 12. Friendship and Happiness in Navajos (Bik’éí Diné Baa’ Hózhó); Angela A.A. Willeto.- Chapter 13. Friendship and Happiness in Latin America: A Review; Agnaldo Garcia, Fábio Nogueira Pereira and Maria Daniela Corrêa de Macedo.- Chapter 14. Family, Friends and Subjective Well-Being: A Comparison between the West and Asia; Tianyuan Li and Sheung-Tak Cheng.- Chapter 15. Attachment Avoidance Harms Friendship Quality and Life Satisfaction among Turkish Children; Nebi Sümer.- Chapter 16. How Are Positve and Negative Peer Relations Related to Positive and Negative Affect in Adolescents over Time? (New Zealand); Paul E. Rose.- Chapter 17. Friendship, Needs Satisfaction and Happiness among College Students in France and Lebanon; Melikşah Demir, Frédérique Cuisiner and Brigitte Khoury.- Chapter 18. I Am So Happy 'Cause My Best Friend Is There for Me When Things Are Go Right: Friendship and Happiness among Emerging Adults in Algeria and Slovakia; Melikşah Demir, Mustapha Achoui and Jaromir Simonek.</p>