This book focuses on building strong personal and professional relationships as a key to success, offering insights on how to manage those relationships effectively, which is crucial for a CRM app.

This classic self-help book provides timeless insights on how to interact with people, improve friendships, and strengthen relationships, which is important when creating a CRM app to manage personal relationships.

This book offers a holistic approach to personal and professional success, teaching important habits to be more effective in managing relationships and achieving goals, which would be beneficial in designing and using a CRM app for personal relationships.