Sen. Joseph Lieberman is working on a book about his Jewish faith.
Simon & Schuster's Howard Books division announced Thursday that "Gift of Rest" will come out in August. Co-written by David Klinghoffer, the book is a reflection on Lieberman's observance of the Jewish Sabbath, a day of rest.
The 68-year-old Lieberman, a longtime Connecticut Democrat re-elected as an independent in 2006, recently announced he would not run in 2012. As Al Gore's running mate in 2000, he narrowly missed becoming the first Jewish vice president.