The Author Startup by John Brehm

A practical, business-minded guide that reframes writing as entrepreneurship, showing how to treat books like products to be tested, launched, and iterated on; it walks through building an audience, validating ideas, choosing publishing and pricing strategies, using newsletters and direct-to-reader distribution, measuring results with simple analytics, and applying marketing and growth techniques so authors can build a sustainable, scalable career rather than relying on one-off releases.