Mary-Kate and Ashley Olsen Working on 'Influence' Fashion Book

The Olsen twins are hoping to spread a little "Influence."

Mary-Kate and Ashley Olsen are working on a coffee-table book about fashion, titled "Influence," that a division of Penguin Group (USA) will release in the fall.

According to a statement issued Wednesday by Penguin, the book will include "exclusive photographs of Ashley and Mary-Kate from world renowned photographer Rankin, and a wide variety of other never-before-seen materials and interviews from Mary-Kate and Ashley's personal collections."

The 21-year-old actresses will be writing about photographers, artists and designers including Bob Colacello, Terry Richardson, Jack Pierson and Christian Louboutin.

"Mary-Kate and I have filled `Influence' with the most interesting, challenging, creative people we know -- the ones who helped pave the way for us and our generation," Ashley Olsen said in a statement.

"Ashley and I interviewed the people who have inspired us, with the hope that they will inspire and teach others," Mary-Kate Olsen said in a statement.