A file picture shows then-US president George W. Bush shaking hands with his father, George H.W. Bush alongside his mother, Barbara Bush, after delivering the commencement address at the Texas A&M University graduation ceremony in 2008. [Photo/AFP]

His paintings made news worldwide, but it turns out that former president George W. Bush has been working on another, highly personal project since leaving the White House: He has quietly completed a biography of his father, former president George H.W. Bush.

Crown Publishers told The Associated Press on Wednesday that the book, currently untitled, will be released on Nov 11. In 2010, Crown published the younger Bush's million-selling memoir, Decision Points.

"George H.W. Bush is a great servant, statesman and father," George W. Bush says in a statement issued by Crown. "I loved writing the story of his life, and I hope others enjoy reading it."

According to Crown, the book will cover the elder Bush's whole life and his influence on his son, from George W.'s "childhood in West Texas to his early campaign trips with his father, and from his decision to go into politics to his own two-term presidency."

The book will be "heartfelt, intimate, and illuminating," Crown publisher Maya Mavjee says in a statement.

"As the only father and son to each have served as president of the United States since John and John Quincy Adams, George H. W. Bush and George W. Bush occupy a unique position in history," Mavjee says. "George W. Bush brings to vivid life his unique perspective of the personal qualities and principles that have animated George H.W. Bush's extraordinary life of service to country and family."