Og Mandino’s University of Success is a compilation of excerpts from various sources offering advice on achieving success and happiness. The book emphasizes the importance of self-belief, goal setting, and hard work, drawing upon principles from various fields including business, psychology, and religion. It explores overcoming obstacles like procrastination and self-doubt, and promotes developing positive self-esteem and utilizing one’s abilities effectively. The compilation blends inspirational stories and practical strategies for personal and professional growth.