Instant Wall Street Journal Bestseller!

Congratulations, you're a manager! After you pop the champagne, accept the shiny new title, and step into this thrilling next chapter of your career, the truth descends like a fog: you don't really know what you're doing.

That's exactly how Julie Zhuo felt when she became a rookie manager at the age of 25. She stared at a long list of logistics--from hiring to firing, from meeting to messaging, from planning to pitching--and faced a th...