Kotter refers to John P. Kotter, a prominent leadership and change management expert. He is best known for his eight-step process for leading change, which provides a framework for organizations to implement successful transformations. His work emphasizes the importance of creating a sense of urgency, building a guiding coalition, and anchoring new approaches in the culture. Kotter's model is widely used in various industries to facilitate change and improve organizational effectiveness. His books, such as "Leading Change," have become essential resources for managers and leaders seeking to navigate complex change initiatives and foster a positive organizational environment.