Justice John Paul Stevens, who retired from the Supreme Court last June after 35 years on the bench, is working on a book.

“I’m writing a book about the five chief justices that I’ve known, and I’ve got it almost done,” the 91-year-old told The Atlantic. “I think I’m going to call it The Five Chiefs. It’s primarily personal recollections of each of the chiefs, and I also have some comments about some of their jurisprudence.”

According to The Atlantic, “a book contract is in the works.”

Stevens is the third longest serving judge in the history of the Supreme Court. The five chief justices he served with are: Fred Vinson, Earl Warren, Warren Burger, William Rehnquist and the present chief justice, John Roberts.

It’s not uncommon for sitting and retired members of the court to pen books. Justice Stephen Breyer released his second book, “Making Our Democracy Work,” last summer. Justice Clarence Thomas published his memoir, “My Grandfather’s Son,”in 2007.

Read the entire interview with Justice Stevens here.