Steve Williams, arguably the greatest caddie in golf history, teams up with renowned golf journalist Evin Priest to give his definitive account of his 12-year partnership with the legendary Tiger Woods, sharing personal, never-before-told moments of their friendship on and off the course.

When Tiger Woods went on an extraordinary majors run between 1999 and 2008, one man stood at his side: his caddie Steve Williams. Together Steve and Tiger dominated the PGA Tour and won an astonishing 13 major championships, their sights set on breaking Jack Nicklaus’s record 18 majors. Before they could overtake Nicklaus, however, their partnership ended abruptly, and a 12-year period without talking began. Years later, the two reconnected.

Steve, with PGA Tour journalist Evin Priest, reflects fondly on his years as Tiger’s caddie and their relentless pursuit of greatness. He revisits all their best moments, from Tiger’s iconic shot on the 16th hole at the 2005 Masters to the famed Tiger Slam of 2000 and 2001, to his against-the-odds victory on a broken leg at the 2008 US Open. Steve goes behind the scenes of their on-course success and shows their friendship off the course, like Tiger caddying for Steve on his wedding day and Tiger giving a heartfelt best man speech. Steve also shares fascinating, never-before-seen photos and ephemera.

Dawn Thirty offers an inside look at what it is like to ride alongside greatness and is a heartfelt ode to the friendship that produced one of the winningest duos in golf history.