The Simon & Garfunkel star's memoir, titled What Is It All But Luminous: Notes From an Underground Man, is set to be released on 26 September (17) through the Alfred A. Knopf publishing company.

In the book, he will reportedly write about growing up in Queens, New York, meeting future collaborator Paul Simon in school and recording their first hit. He will also reportedly delve into his fraught friendship with Simon, their success as a duo and his later solo career, losing his singing voice in 2010 due to vocal cord issues, and later having his voice restored in 2014.

"He writes of being an actor working with directors Nicolas Roeg (Bad Timing) and Mike Nichols ("the greatest of them all")," the synopsis on reads.

"Getting his masters in mathematics at Columbia; choosing music over a PhD; his slow unfolding split with Paul and its aftermath... his voice going south (a stiffening of one vocal cord) and working to get it back... about being a husband, a father and much more."