Wagner, now a high school baseball coach at the private Miller School of Albemarle in Charlottesville, recently wrote an autobiography called "A Way Out: Faith, Hope and Love of the Game."
''It's not meant to be a best-seller," Wagner, who played high school ball for Tazewell High School in Virginia, said Tuesday in the clubhouse.
"It's meant to help that kid that is in Southwest Virginia, who somebody said, 'You're not going to be anything, and you're never going to accomplish anything.' It's meant for those people, so that they can read it and go, 'Well, this kid was in the same situation.' You might not go on to be a major leaguer, but there's a way out."
Wagner attended Ferrum College for a year before being selected by the Houston Astros with the 12th overall pick in the 1993 Major League Baseball amateur draft. A seven-time All-Star, he retired from the majors in 2010 with 422 career saves.
Wagner's book will be available for purchase Sept. 3.