This document provides a timeline of key publications related to product discovery, listing books and authors from 2003 to 2018 in chronological order. It includes publications such as "The Four Steps to the Epiphany" by Steve Blank from 2003, "Inspired" by Marty Cagan from 2008, and "Measure What Matters" by John Doerr from 2018. The timeline is intended to outline the major works that have shaped the field of product discovery over the past 15 years.