Jennifer Weiner has sold millions of books, spent a combined five years on the New York Times best-seller list, and amassed 109,000 followers on Twitter. Last week, she descended into the basement of New York City’s Ace Hotel to share a handful of her self-promotional secrets. The talk, sponsored by the PEN American Center, was titled “How to Be Authentic on Social Media,” but its true subject was how to promote your book on the Internet without making everyone hate you. Weiner advised authors to tweet about the things they love (for Weiner, it’s the reality TV romance competition The Bachelor); to tweet about the authors they love (Roxane Gay and Gary Shteyngart are two of her favorites); and to tweet about their own projects “sparingly, carefully, modestly, thoughtfully, and absolutely as little as possible”—and let their now-loyal crew of social media followers spread the word. The talk was a handy primer, charmingly delivered. But it referred only obliquely to Weiner’s true social-media innovation: Co-opting her haters into her personal brand.