Thomas Turner, a professor emeritus at Bridgewater State University, will offer a presentation on his recently released book “Not to be Ministered Unto, But to Minister” at 12:30 p.m. Saturday in the Flora T. Little Room at the Bridgewater Public Library. Turner’s book takes an in-depth look at BSU from its beginnings as a small “Normal School” in 1840 to its present status as a large university sitting on a 270-acre campus and serving more than 11,000 students. In an interivew, Turner said he began writing the book at the request of university President Dana Mohler-Faria. “I was standing in line at Dunkin’ Donuts when the president tapped me on the shoulder and said, ‘I have a proposition for you,’ ” Turner said. Turner said a full history of the school had not been written since 1933.