on Jane Friedman site:

Earlier this year I left a job I liked at an early stage startup to write a book. To most people I talk to that sounds like quite a leap, but the nature of the work has been surprisingly similar.

Since I started writing dot com et al: the secret life of domains, I have been searching for book-market fit, just as startups search for product-market fit. I’ve been interviewing potential readers, just as startups interview potential customers. I’ve been reading and studying comparable books, just as startups keep an eye on competitors and companies they admire. I’ve been iterating fast by writing an email newsletter and tweeting in public, just as startups publish blogs and post on social media.

Writing my book like I’d run a startup has helped me build confidence and conviction about who my readers are and whatthey’re interested in—and perhaps as importantly, what they’re not interested in and who I’m not writing to. It has allowed me to naturally market my book and be clear-eyed about its potential.