New book delves into Prince William and Prince Harry's rift: 'So much pain and trauma'

Prince Harry and Prince William's fractured relationship began long before their wives joined the royal family. When Harry, 36, and wife Meghan Markle separated their home and office from William, 38, and Kate Middleton in 2019, the siblings' rift became clear to the public. However, historian Robert Lacey's new book "Battle of Brothers: The Inside Story of a Family in Tumult," excerpted in this week's issue of People, explores the deep-rooted nature of the princes' schism dating back to their parents' turbulent marriage.