People ask me all the time whether writing a book is worth it. I never answer that question in the abstract, because the abstract doesn't tell you anything useful. What tells you something is the specific. The hotelier who had been trying to write his book for five years, who doubled his speaking fees within months of publication. The lawyer who wanted to be the foremost authority in her field — and became exactly that. The leader who came to write one book and discovered she needed to write a completely different one — the one she'd kept off the table her entire life. These are their stories.