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"Win or Learn" is the captivating autobiography of John Kavanagh, the coach of the famous MMA fighter Conor McGregor. In this book, Kavanagh shares his inspiring life story, which is closely tied to the rise of mixed martial arts. From his beginnings as a bullied teenager wanting to defend himself to his success as a coach and mentor for many aspiring fighters, the book offers a deep insight into the world of combat sports. Kavanagh not only conveys his experiences in training but also the philosophy behind his motto "Win or Learn," which serves as a source of motivation for many. This book is significant not only for MMA fans but also for anyone looking to understand the principles of ambition, discipline, and perseverance.