Steve Jobs knew that he was going to die soon, according to the authorized biography of late Apple co-founder and innovator.

Walter Isaacson, author of the book now titled "Steve Jobs" told reporters that Jobs knew that he was going to die soon and told Isaacson in their latest interviews. The biography will reveal further details of this exchange towards the end of the book.

Steve Jobs died on October 5 after a long battle with pancreatic cancer. His family hasn't released a statement as to what his cause of death was.

Isaacson's bio formerly known as "iSteve" isn't finished despite publisher Simon & Schuster pushing the release date to October 24, in eBook and print formats. The book was previously set for a 2012 release but was later pushed forward to November 2011 and then recently to October. The bio has more than two years' worth of interviews with Jobs and his family, friends, colleagues and rivals in the industry.

The 656-page book is already expected to top best seller lists. Online pre-orders for the book are booming and it has the top spot on Amazon's best-seller list. The book is reportedly a candid look at one of the tech world's brightest stars.

"Although Jobs cooperated with this book, he asked for no control over what was written nor even the right to read it before it was published," Barnes & Noble said.

"He put nothing off limits and instead encouraged the people he knew to speak honestly, even foes, former girlfriends, and colleagues he had once fired or infuriated," it said.

Isaacson is the bestselling author of other biographies "Benjamin Franklin: An American Life" and "Einstein: His Life and Universe." He is the chief executive of the Aspen Institute think-thank and a former executive at Time magazine and CNN.