A CEO for All Seasons by McKinsey's Dewar, Keller, Malhotra, and Strovink provides a lifecycle guide for leaders, framing the CEO journey into four distinct phases, Spring (preparation), Summer (starting strong), Fall (staying ahead), and Winter (sending it forward), to help executives adapt their strategies and behaviors to each stage, recognizing that effective leadership demands different approaches in different cycles, from initial setup to legacy formation, using insights from top executives.