Kardashian Sisters Book “Kardashian Konfidential” Nov 23

The Kardashian Sisters are writing a memoir.

Reality stars Kim, Kourtney and Khloe Kardashian — who already endorse a collection of bronzers and the PerfectSkin skin care line as a trio — will write their first book together to be published this fall, PEOPLE dishes.

The book Kardashian Konfidential will be “full of fun facts about their childhood, their beauty and style secrets, the wisdom they learned from their beloved father, and the street smarts they got from their mother that sustain them in life and in business,” the book’s publisher, St. Martin’s Press, said in a statement Thursday.

The Double KK Girls promises to include plenty of never before seen (or tweeted) family photos and correspondence, including diary entries.

“It’s going to [have] lots of fun tips and stories and everything about relationships; it’s a little bit more of an in-depth look into our lives, even though people think that they’ve probably seen everything. We’re just being super-candid and sharing lots of pictures and fun stuff,” says socialite sis Kim, 29.

Kardashian Konfidential hits booksellers’ shelves Nov. 23.