This document provides an introduction to a self-help book titled "Invest in Yourself" that aims to guide personal and professional development through spiritual and practical means. The introduction discusses the author's experience with religion growing up and how it led him to see the Bible as the best self-help book. It emphasizes that the key to improvement is changing one's thought process to be more positive by understanding God's unconditional love. The book that follows will explore a five-step process for improvement based on the PDCA cycle of continuous improvement.