Incomparable is one of the most open, emotional, and honest wrestling memoirs of all time as Nikki and Brie Bella really reveal a lot about themselves. Recapping their lives both inside the ring and outside of it, the book is incredibly raw and that allowed the reader to really feel connected to the twins.

RELATED: 10 Backstage Stories About The Bella Twins That We Can't Believe

They have never been known to hold things back, and that certainly wasn't the case here and that's why the book was so popular. Giving fans a chance to learn personal things about them that not even their family members knew prior to reading showcases how open the book is, and there really is a lot of interesting insight to be learned about their lives here.

10 Nikki The Runaway

Nikki Bella

One aspect of the book that they didn't hold back in discussing was their childhood. It's clear that their relationships with their father weren't brilliant, as he struggled with drug abuse, drinking problems and he was sometimes violent towards them.

Nikki Bella took this hard and she actually ran away from a while, staying at other people's homes as the police searched for her. Nikki was the reason their mother finally ended the relationship as she refused to return home until that happened.

9 Brie & Bear

Brie Bella

Another very emotional section of the book was when Brie Bella wrote about her first real love, Bear. The young couple clearly connected on a deep level and reading about how he died in a car accident was very tough.

Brie was honest about how much he did and still does mean to her which was interesting to read. She also revealed the tattoos she has on her hips are in honor of him as a way of remembering what he was to her.

8 Locker Room Problems

Bella Twins

Something that was very clear was the fact that Nikki and Brie weren't exactly welcomed to WWE with open arms. The locker room was very unkind to them at first, forcing them to get changed in the toilets amongst the fans, refusing to let them in the changing room.

RELATED: 10 Ways To Actually Tell The Bella Twins Apart

They also revealed that the locker room once called a meeting against them because they were getting too much TV time, as well as calling out Natalya in the same meeting for apparently being annoying.

7 Royal Rumble Problems

wwe-bellas-rumble Cropped

Nikki Bella was part of the final two at the first-ever women's Royal Rumble, but she and Asuka were made to change the finish to the match on the day due to the men wanting to do the same spot.

Nikki revealed the men the changed their mind after she and Asuka had worked on things, and stated that several men were actually angry that the women were headlining that show, proving that not everyone was on board with the women's evolution at the time.

6 Nikki & John

Nikki Bella and John Cena

Plenty of the book covered the relationship between Nikki Bella and John Cena, and it showcased just how deeply Nikki loved John. They revealed that E! didn't even know they were in a relationship when Total Divas began, showcasing that they really did just want the twins.

RELATED: 10 WWE Wrestlers You Didn't Know Were Married

Brie Bella also revealed in the book that Cena never earned a single dollar from the E! franchise throughout all of the Total Divas filming, and he simply got involved due to how proud he was of Nikki.

5 Total Divas Importance

Total Divas

There's no doubt that being part of Total Divas changed things for Nikki and Brie Bella, but they revealed in the book that it was the show that actually brought them back to WWE after they initially turned down five-year contracts.

They were pursuing a reality show about them and their family, but WWE provided them with the chance to wrestle and have Total Divas, and that was the reason they made their return.

4 Nikki Didn't Appreciate Ronda Rousey's Debut

Ronda Rousey debut in WWE

While Ronda Rousey certainly brought a lot to WWE and she and Nikki Bella ended up having a great match and respect for each other, Nikki was initially unhappy with her debut.

Ronda came out after the first-ever women's Royal Rumble, which Nikki was part of, and she felt that it was a slap in the face. Nikki didn't like the fact that a non-wrestler upstaged one of the biggest moments in women's wrestling history.

3 "It Was Worth Breaking My Neck For"

Speaking of Nikki Bella and Ronda Rousey, she spoke in detail about Vince McMahon personally calling her back to headline Evolution with her. Nikki admitted that the whole return wasn't what she hoped for due to the incredible pain she was in, stating she cried herself to sleep for two months.

However, the moment itself she felt was brilliant. Nikki stated the whole night was worth breaking her neck for because of what it meant to women and those who were watching.

2 Sexual Assualt

Nikki Bella

One of the most upsetting parts of the book is when Nikki Bella opens up about how she has been sexually assaulted twice over the course of her life. It was a very brave move of her to reveal this, as her family wasn't even aware prior to the release of the book.

However, the decision to share such personal details will no doubt help others deal with similar unfortunate situations and continues to raise awareness and ignite a conversation, which is incredibly important.

1 Nikki's Backstage Argument

Nikki Bella delivers forearm

Nikki Bella openly admitted that they weren't always perfect backstage themselves, and while she didn't name the other wrestler, Nikki admitted she once had a big argument with someone else.

Nikki actually cornered the wrestler and threatened them, with Brie having to pull her away before things went too far, showing a slightly different side to them than what is normally provided.

NEXT: Nikki Bella's 10 Best Outfits In WWE