“When I write a book, I like to enlist my own challenge network. I recruit a group of my most thoughtful critics and ask them to tear each chapter apart. I’ve learned that it’s important to consider their values along with their personalities—I’m looking for disagreeable people who are givers, not takers. Disagreeable givers often make the best critics: their intent is to elevate the work, not feed their own egos. They don’t criticize because they’re insecure; they challenge because they care. They dish out tough love.”