When Queen Elizabeth II died in September 2022, it seemed like the planet stopped turning.

Even Prince Harry’s world appeared to be crashing down as he was especially close to his late grandmother.

Omid Scobie’s new book “Endgame: Inside the Royal Family and the Monarchy’s Fight for Survival” — out Nov. 28 — details how the Duke of Sussex, 39, was kept in the dark about his queen’s passing.

In an excerpt obtained by People, the author wrote that King Charles III called Harry just before the monarch died to inform him that the end was near.

Charles, 75, was going to Balmoral Castle in Scotland where Elizabeth was resting alongside now-Queen Camilla.

The former Prince of Wales, Charles, demanded that Harry make his way to Scotland as soon as possible.

His estranged older brother, Prince William, was already arranging his own flight to the royals’ summer residence.

Harry had texted William, 41, asking how he and his wife, Kate Middleton, 41, planned to travel, and if they could go to Balmoral as a trio.

However, the Invictus Games founder allegedly received no response from the now-Duke of Cambridge.

“With no further information from other family members or Palace aides, the Sussexes and their team had to operate in the dark,” Scobie wrote.

William had decided to fly with his uncles Prince Edward and Prince Andrew, with Harry feeling left out that no one told him they were jet-setting together.

“It was upsetting to witness,” a Sussex source told Scobie for the book. “[Harry] was completely by himself on this.”

Charles later phoned Harry again and requested that he come to Balmoral solo — without wife Meghan Markle.

But after back-and-forth between the father and son, Harry agreed that the “Suits” alum, 42, should not come with him — after Charles “assured him that Kate would not be there either.”

The royal journalist penned: “Charles had cited ‘protocol,’ but the reality was that Kate chose to stay back to pick up the children from their first day at a new school.”

“They just didn’t want Meghan there,” a former palace aide noted.

“[Meghan] could sense she wasn’t wanted,” a pal chimed in.

There were allegedly empty seats on William’s chartered private jet, but it was due to leave too soon and so “Harry was left to fend for himself.”

“William ignored him,” an insider claimed. “He clearly didn’t want to see his brother.”

At his cottage in Windsor, Harry was able to secure a jet costing $37,000 that could takeoff from London’s Luton Airport quickly.

“Rumors of the Queen’s passing were rife at this point, Harry had no way of knowing whether it was true. His father doesn’t carry a cell phone and his brother wasn’t acknowledging his existence,” the book read.

William and his family were unable to say their last goodbyes to the sovereign, as she died at 3:10 p.m. that day, and the Firm landed at 3:50 p.m.

Harry’s plane took off at 5:35 p.m., and he “still had no idea what was going on.”

The queen’s death was confirmed to Prime Minister Liz Truss an hour before Harry’s plane cruised off the ground, and he was “in the dark” for the 70-minute flight.

“Palace ‘sources’ later briefed certain papers that Charles had personally shared the news with his younger son, but this was just a move to save face,” Scobie wrote.

“Harry was crushed,” a friend said. “His relationship with the queen was everything to him. She would have wanted him to know before it went out to the world.”