Heart's Ann and Nancy Wilson, the first sisters of rock and roll, will recount the journey of their long and winding career in a memoir due out next year. 

Nancy Wilson, the guitar playing sister, told Billboard that she and singer Ann have teamed up with Charles Cross, a Seattle author who has penned books about Nirvana, Led Zeppelin and Jimi Hendrix, for the endeavor.

Expect a page turner, as Nancy says they will be holding nothing back as they recount their career.

"We're telling the whole story," Wilson said. "I think it's important to be kind of brutally honest without making anyone else feel bad in any way, if possible. There's a lot of stuff you remember that's like, 'Wow, why did I do this with that person?' or 'What was I thinking?!' or 'How controlling was so and so?'"

While it is an open, honest, hard look at the band, which is celebrating the thirty-fifth anniversary of its debut album 'Dreamboat Annie,' Nancy is adamant that the tome is not going to go the gossipy route. "It's definitely not a sensational, tell-tale book because that's never who we are," she admitted. "There's going to be some wild parties and some failed relationships, but not too much more dark stuff really."

Nancy said that her older sister has an "incredible" memory, which they mined for material for the book. Nancy, who divorced director Cameron Crowe in 2010, continued, "I feel like I've had a lot of painful situations that I intentionally delete from my memory. So it's been really good to have Ann there to remember a lot of this stuff because I think I kind of have defense mechanisms with forgetfulness."

Heart will reportedly enter the studio once they get off the road, with the intention of recording a new record, the follow-up to 2010's 'Red Velvet Car,' before Christmas.

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