Taylor Swift has a new 'weapon' with her book Eras Tour to tell her truth and put those who have betrayed her in their place

Taylor Swift could hit out at any ex-partners she feels "crossed" her in her new book celebrating the creation and success of her Eras Tour as she prepares to launch a 256-page novel recounting the billionaire's success.

Swift embarked on her Eras Tour in March 2023 and as it finally begins to come to a close, the 34-year-old hopes to celebrate it with her fans by giving them extra inside info that wasn't captured through the movie.

The Official Eras Tour Book will include her "own personal reflections" of her most successful venture yet and a source warns that her exes should be very worried if they treated her wrong in the past.

"Taylor never holds back in her song lyrics and the same is going to be true of this book," an insider told RadarOnline.com. "It is a celebration of her tour of course, and really glossy and filled with her usually positivity.

"But anyone who has crossed her better be scared. She is also going to use this book as a take-down of anyone she feels has crossed her.

"Including those who shared those 'showmance' rumors. It will have references to it all in her own way, just like her songs."

Will she write about Travis Kelce?

Swift has previously had high profile relationships with Harry Styles, Jake Gyllenhaal and most recently Joe Alwyn, before she began dating the Kansas City Chiefs' Travis Kelce around August 2023.

The popstar is known for using her former partners as lyrical inspirations for her tracks, drawing from her own experiences with them. For example, All Too Well is widely suspected to be about her relationship with Gyllenhaal when she dated him in 2010.

But Kelce will likely come out of the book in a positive light as their relationship continues to blossom, with engagement rumors even regularly being circulated although the pair currently deny them.

"She's making a conscious effort to let her hair down," a source told Radar Online of her new policy to Kelce. "When they first got together, she was focused on the timing of everything.

"Like when they'd have their first public date, their first public kiss, etc. That's her style, she micromanages her image. But now she's going to take the handcuffs off and do what comes naturally."