The book "Customer Chemistry" presents a program to help businesses focus on their best customers for increased profits. By identifying and nurturing these valuable customers, companies can strengthen relationships and boost their bottom line. The book offers practical strategies and case studies to guide businesses in prioritizing the right customers and maximizing their value. It challenges the traditional approach of focusing on selling products rather than building long-term customer loyalty. Customer Chemistry emphasizes the importance of understanding and catering to the needs of key customers to drive business success.