"How to Develop Relentless Competitors" by Jeff Janssen is a brand new perfect paperback book published in 2010. The book, with a weight of 0.65 pounds and 182 pages, offers insights on how to be a successful competitor in various aspects of life and business. Written in English and under the title "Winning the Mental Game," it delves into competitive strategies and mental preparation to help readers develop resilient and highly motivated competitors. Jeff Janssen's expertise and detailed approach make this book a valuable resource for those looking to enhance their competitive spirit and skills."