New York, New York - Ahead of the release of his new memoir Spare, Prince Harry has let it rip on where he stands with his brother Prince William and the royals.

Will the Duke of Sussex ever return to his role at Buckingham Palace?

During teasers of his sit-down chat with Good Morning America's Michael Strahan on Monday, the 38-year-old British royal said he doesn't think there will ever be "peace" with his family "unless the truth is out there." The full piece will air on Monday night.

It was only the latest of Prince Harry's bombshell revelations, and served as a possible reason why he may be hammering so hard on interviews ahead of his book's release on Tuesday - including particularly biting chats with 60 Minutes and ITV.

While discussing his view on the monarchy, the Duke told Strahan, "There's a lot that I can forgive, but there needs to be conversations in order for reconciliation, and part of that has to be accountability."

"Even if there was an agreement or an arrangement between me and my family, there is that third party that is going to do everything they can to make sure that that isn't possible," he continued, referring to the British press.

"Not stopping us from necessarily going back, but making it unsurvivable, and that's really sad because that is essentially breaking the relationship between us."

The Duke of Sussex also talked more about his fractured relationship with Prince William who he called his "beloved brother and arch nemesis" in the memoir.

"There has always been this competition between us, weirdly. Again, I think it really plays into, or is played, by the heir/spare," Harry told Strahan.

While also noting that he felt that the Duke of Wales was "jealous" of Harry's position as the "spare", he accused the British press of driving a wedge between the brothers.

He also revealed a longstanding pact the siblings made not to let their offices fight or brief the press against each other.

"I hope that we will be joined at the hip again," he expressed, "because, you know, if there's something that will terrify the British press more than anything, it's William and I being aligned."

Harry explained that he "without question" shoulders some of the blame for the breakdown of his relationship with William.

"What people don't know is the efforts that I've gone to in order to resolve this privately, both with my brother and with my father," he added.

The full ABC News interview with Harry, Prince Harry: In His Own Words | Michael Strahan Reporting will stream on ABC News Live and Hulu Monday at 8:30 PM.