The book provides career advice for adapting to changing work environments. It argues that individuals should view themselves as entrepreneurs managing their own career startups. The key is developing a competitive advantage through skills, maintaining a growth mindset, and using an entrepreneurial approach to career planning. This includes experimenting to learn (Plan A), being flexible to changing plans (Plan B), and having a backup plan (Plan Z) for unexpected situations. The book stresses that a strong professional network of allies and acquaintances is crucial for learning, opportunities, and support throughout one's career.