If there's one thing the Duke and Duchess of Sussex's journey from dating to marriage, to stepping down from royal duties, has not lacked, it's commentary from 'insiders' and 'experts'.

But new bookFinding Freedom, written by royal reporters Carolyn Durand and Omid Scobie, has described the journey - full of controversy and resentment - from beginning to end, based on the authors' own experiences as members of the royal press and quotes from sources 'close to the couple'.

Harry and Meghan have not contributed to the book, but in terms of royal exposés, this is a s 'official' as it gets.

Harry and Meghan, from birth to now. Post continues below video.

Finding Freedomwas published on August 11, giving readers an insight into the lives of the couple, and their relationships with the royal family, before, during and after their decision to leave England behind.

This is what we've learned fromFinding Freedom.

The first time Harry and Meghan said 'I love you'.

Harry and Meghan met on a blind date in the summer of 2016, in a discreet Soho, London club. For three hours they spoke, huddled "in their own little world".

"Almost immediately they were almost obsessed with each other," a friend told the authors.

"It was as if Harry was in a trance."

Shortly after the date, Meghan began following a mystery Instagram account, @SpkieyMau5, belonging to the undercover prince.

After three months, Prince Harry said he loved her.

"It was Harry who said it first, but Meghan immediately replied, 'I love you, too'," the book says.

Almost immediately, Harry became protective of his connection with Meghan.

According to the book, word got back to him that an old friend of his had been gossiping about Meghan's Hollywood background. The prince immediately cut him off.

During the early days of their romance, Meghan was photographed in a 14-carat gold necklace with the initials "H" and "M."

The book claims the necklace sparked controversy amongst palace aides.

"She was advised that wearing such a necklace only served to encourage the photographers to keep pursuing such images - and new headlines."

There was a secret engagement months before an official announcement.

Harry and Meghan took a trip to Botswana in August 2017, where they celebrated their first anniversary as a couple and Meghan's 36th birthday. The trip may have also seen the prince get down on one knee.

During their official engagement interview in November of that year, Harry said he proposed earlier that month during a cosy night at home.

But the biography says their wedding plans had already been a done deal for at least three months.

The book also claims that the couple were already engaged when they made their debut at the Toronto Invictus Games in September 2017.

Meghan reportedly hinted at the engagement by wearing a white button-down top known as the "Husband Shirt" from her designer friend Misha Nonoo's collection.

Prince William was wary of Meghan's intentions.

Prince William angered Harry with a perceived 'snobbish' tone when warning his younger brother about his relationship with an American actress,Finding Freedomclaims.

William told Harry to "take as much time as you need to get to know this girl", with a source close to William claiming he didn't want his brother to be "blindsided by lust".

"In those last two words, 'this girl', Harry heard the tone of snobbishness that was anathema to his approach to the world," a Sunday Times excerpt, released ahead of the book's publication, says.

"Also, to remove Meghan from the equation, Harry was tired of the dynamic that had become established between him and his older brother," the authors add.

The riff between William and Harry had been brewing for a while, with Harry reportedly disillusioned by his place in the royal pecking order and feeling like a 'third wheel' with William and the Duchess of Cambridge.

William wasn't the only one who questioned Harry's relationship; palace insiders also referred to Meghan as "Harry's showgirl" and said she came with a lot of baggage, the authors claim.

How Meghan met William and Kate.

When it came time for Meghan to finally meet Prince William, Meghan was apparently ready to be "grilled", according to the book.

But things weren't as intense, with William reportedly saying "I was looking forward to meeting the girl who has put that silly grin on my brother’s face."

Meghan also met Kate during a visit to Kate and William's Kensington Palace home. In the book, a friend explained that Kate is an "extremely guarded person" but things became more relaxed when Meghan gave Kate a birthday gift, a soft leather Smythson notebook, and doted upon Princess Charlotte.

There was no feud between Meghan and Kate.

The book claims rumours of an ongoing feud between the Duchesses of Cambridge and Sussex were false - they just had nothing in common.

The widely reported rumours that Meghan made Kate cry during a bridesmaid fitting for Princess Charlotte before her royal wedding were also untrue.

"Some of the children weren’t cooperating, and there was a lot going on," a source who was there says in the book.

"Everyone tried to help where they could, but it's never easy with kids at fittings. There were no tears from anyone.

"And in the end, the fitting was fine. Kate and Meghan were both a little stressed but professional in the room, and there were other people there."

"The truth was that Meghan and Kate just didn't know each other that well," the authors state.

The Sussexes moving to Windsor and removing themselves from Kensington Palace had nothing to do with Kate. In fact, it was mostly Harry who felt suffocated by his brother.

Inside Harry and Meghan's wedding.

Finding Freedomgives us some behind-the-scenes insight to Harry and Meghan's wedding.

In one part of the book, the authors claim that Harry became frustrated by the Queen's longtime dresser, Angela Kelly, who he felt was stopping Meghan from accessing her chosen tiara for a wedding hair trial.

At the time, a number of UK tabloids reported that the Queen had rejected Meghan's first choice of tiara, but the book claims it was actually Harry and Angela who had the conflict.

During their wedding day, the pair reportedly danced to the 1968 song 'I’m in Love' by Wilson Pickett at their evening reception at Frogmore House. 'My Girl' by The Temptations and a selection of Stevie Wonder songs were also played.

The family photoshoot for Prince Charles' birthday was a "nightmare".

In November 2018, an official photo of the Royal Family was released to celebrate Prince Charles' 70th birthday.

Charles, Camilla, Harry, Meghan, William, Kate and their kids were all pictured smiling at each other in the photo.

But according to the book, the process of planning the photo shoot was "an absolute nightmare".

"The boys can be hot and cold with their father," a source claims.

"Neither William nor Harry made much of an effort to make themselves available."