The second revised and expanded edition of this successful handbook extensively explores the idea and practice of love from diverse cultural, psychological, and biological perspectives. It provides a comprehensive understanding of love by examining its various manifestations, cultural interpretations, and the underlying psychological and biological mechanisms that shape it. Notably, the book won the William B. Gudykunst Outstanding Book Award from the International Academy for Intercultural Research in July 2023, underscoring its scholarly excellence. The work is structured into several 11 key sections to cover the field comprehensively. It begins with an exploration of theories and concepts of love, followed by an examination of cultural interpretations and practices, and exploring the different forms and expressions of love, such as romantic love, familial love, platonic love, and self-love or friendship. Next, it addresses the dynamics of romantic relationships, exploring topics such as love and marriage, love in the digital age, and long-distance relationships. It also covers challenges and complications in love, including conflict, unrequited love, mental health issues, and the healing process after breakups. To reflect the evolving nature of love in contemporary society, the work includes a section on modern love and technology, discussing topics like love and artificial intelligence, cyberspace as a romantic culture, and the future of intimacy. It also examines love in later life. The handbook features contributions from a wide range of experts, including psychologists, sociologists, anthropologists, neuroscientists, relationship counsellors, therapists, and literary authors. This ensures a rich and varied perspective on the subject matter. Additionally, it serves as a valuable academic resource for educators, learners, and researchers in related fields. Through personal stories, literary excerpts, and philosophical discussions, the reference work also invites readers to reflect on their own experiences and beliefs about love, inspiring personal growth and deeper connections with others. The handbook is an essential resource for anyone seeking a deeper understanding of love in its many forms and contexts, and provides a comprehensive guide that is both academically rigorous and accessible to a broad audience.