A royal author and Prince Philip's friend revealed that Queen Elizabeth II suffered from bone marrow cancer before she died on September 8. Allegedly, nobody told Prince Harry about this news, as no one seemed to trust him and his wife, Meghan Markle, with this important information.

Queen Elizabeth's alleged cancer had the most common symptom: bone pain. This might have something to do with her announced mobility issues, which were often said to be her medical concern.

In Gyles Brandreth's upcoming book, "Elizabeth: An Intimate Portrait," the royal expert detailed the late monarch's alleged health struggle. In a serialization in Daily Mail, he wrote the news he heard that Her Majesty had a "form of myeloma" or bone marrow cancer, from which her tiredness, weight loss, and mobility issues might have stemmed.

It was normal for people with myeloma to have bone pain, especially in the pelvis and lower back. Multiple myeloma is also a disease that often affects the elderly.

Sadly, there's no cure for this disease, though there are treatments and medicines to help regulate the immune system and drugs to help prevent the weakening of the bones. These can help reduce the symptom's severity and the patient's survival by months or years.

Amid the diagnosis, Brandreth claimed that Prince Harry and Meghan Markle were not told about Queen Elizabeth's health problem. Kinsey Schofield, "To Di for Daily" podcast founder and creator, believed they weren't "trusted" with the news, per Express.

In the latest episode of the podcast on a TalkTV segment with Cristo Foufas, he claimed that Brandreth got the royal family's permission to out Queen Elizabeth's cancer diagnosis in his book. So, it would no longer be breaking news if the Duke of Sussex included it in his upcoming memoir, "Spare."

Schofield found the move as "intelligent," and perhaps the royal family wanted to control how this big revelation would be released. Prince Harry's controversial book is set to be out on January 10.

But as early as now, Amazon has been giving it away for free, a bold move for the retailer. Royal fans and everyone who wants to get their hand on this tell-all memoir are advised to take advantage of this discount, which can be avail when they sign up for a free trial of Amazon's audiobook app, Audible.

However, they must cancel the free trial to ensure they will not be charged for the audiobook when it officially drops. The hard copy of Prince Harry's "Spare" is also available at a huge discount, from £28, it can be purchased for only £14.