Reiss' preview of the book reveals that the relationship between Brady and Belichick began to fracture after Jimmy Garoppolo was drafted in the second round of th 2014 NFL Draft.
It's a question that's been tossed around for years, and the debate gained steam in recent months amid reports of tension in Foxboro.
According to Ian O'Connor's new book, "Belichick: The Making of the Greatest Football Coach of All Time", Brady wanted a "divorce" from the Patriots and Belichick this past offseason.
ESPN.com published an article Wednesday detailing some of the notable material in O'Connor's book, which hits shelves next week, and it's clear Brady and Belichick haven't always seen eye to eye.
It also says Brady's own family believed Belichick would push Brady out before he was ready to retire.
Brady started worrying for his job nearly immediately after Belichick cited his age and contract status - and the coach's desire to be "early rather than late at that position" - when the Patriots drafted Garoppolo in 2014. "But if you gave us any of the top 15, we could do it", the assistant said. "I don't think the coaches view Tom as special as everyone else in football does". "The moment Belichick moved [former Patriots backup quarterback Jimmy] Garoppolo to San Francisco, and banked on Brady's oft-stated desire to play at least into his mid-forties, was the moment Brady was virtually locked into suiting up next season and beyond". He was the only one among the league's 32 starting QBs who did not show up.
The New England Patriots are a dynasty, as the team has been on an extended stretch of dominance that puts it in historically great company.