How to Retire Happy, Wild, and Free by Ernie J. Zelinski is a motivational and practical guide that offers advice on how to live a fulfilling and joyful life after retirement. The book emphasizes the importance of pursuing passion, hobbies, and leisure activities, while also focusing on financial security and lifestyle choices. Zelinski’s writing inspires readers to embrace retirement as a new and exciting chapter of life, filled with adventure and personal growth.