If the Beastie Boys wrote a book, you might expect it to depart from standard memoir form. Rather than a strict narrative patiently winding its way from bygone days, such a book might — in keeping with the group’s hypereclectic style — be a pastiche of voices, images, irreverent humor and pop-culture reference points.

And that, it turns out, is exactly what the Beastie Boys’ book will be like.

Michael Diamond (a k a Mike D) and Adam Horovitz (Ad-Rock), the surviving members of the hip-hop group, have signed a deal with Spiegel & Grau, an imprint of the Random House Publishing Group, for a book celebrating their history and aesthetic. A title has not been chosen, but it is planned to come out in fall 2015, the publisher is expected to announce this week.

The publishing world has had a flurry in recent years of rock memoirs by baby boomers like Keith Richards, Eric Clapton and Pete Townshend. But readers should not expect anything like those books, said Julie Grau, the publisher of Spiegel & Grau.

The Beastie Boys are “interested in challenging the form and making the book a multidimensional experience,” Ms. Grau said in an interview. “There is a kaleidoscopic frame of reference, and it asks a reader to keep up.”

The book, to be edited by the hip-hop journalist Sacha Jenkins, will be loosely structured as an oral history. It will also have contributions by other writers, as well as a strong visual component. Ms. Grau and Luke Janklow, the group’s agent, both compared it to Grand Royal, the Beastie Boys’ acclaimed but short-lived magazine in the 1990s, which explored some of its wide-ranging pop-culture interests with curiosity and snark.

“The first words out of Mike’s mouth were, ‘I don’t want to do a straight memoir,’ ” said Mr. Janklow, of Janklow & Nesbit.

Mr. Janklow said he had been in talks with the group several years ago about the possibility of a book, but they were set aside as the third Beastie Boy, Adam Yauch, known as MCA, began to suffer from cancer of the salivary gland; he died last year at 47.

“After Yauch died, I didn’t push them,” Mr. Janklow said, “but I think that Adam and Mike ended up realizing that it was the right time for them.” A spokesman for the Beastie Boys did not respond to a request for comment.

With the Beastie Boys book, Spiegel & Grau has continued to carve out something of a niche for high-concept books by hip-hop icons. In 2010 it published Jay-Z’s “Decoded.”

nytimescom