The Portland Press Herald reported best-selling author Tess Gerritsen and singer-songwriter David Mallett will receive honorary Doctor of Humane Letters degrees and share remarks at the 212th Commencement May 10 at the University of Maine. Mallett will address the 10 a.m. ceremony, and Gerritsen will speak during the 2:30 p.m. ceremony. Gerritsen, who lives in Camden, has published suspense novels in 40 countries, and has sold more than 25 million copies. Mallett lives in Sebec and has a music career spanning four decades. His songs have been recorded by more than 150 artists.