For books on sales, you can refer to the following suggestions: 1 "Sales Psychology"( ·Csikszentmihalyi): Understand the psychology and behavior of customers to better sell products. 2."Influence"( ·Cialini): It explored the basic principles of influence to help salespeople improve their persuasiveness and influence. Customer Insight ( ·G·Hartwitz): Understand customer needs and problems to provide better solutions for customers. 4. Sales Strategy ( ·Reid): Help salespeople formulate sales strategies to improve sales performance. Successful Selling (Hopkins): It explored the key factors in the sales process and provided practical tips and methods to help salespeople achieve successful sales. The books above are all classic works on sales. They can help salespeople better understand customer needs and improve their sales ability and performance.