Influence: The Psychology of Persuasion by Robert Cialdini is a classic book that explores the principles of persuasion and how they can be applied to e-commerce businesses. Cialdini identifies six universal principles of influence, including reciprocity, scarcity, and social proof, and explains how they can be used to persuade customers to make a purchase. This book provides valuable insights into consumer behavior and offers practical advice on how to apply these principles to your e-commerce marketing strategies. Whether you're a marketer or business owner, Influence is a must-read for understanding the psychology behind successful persuasion.