On another front, Glass is a folklorist and historian, focusing on Carroll County, Maryland. In 1982, Glass' compilation of folklore "Ghosts and Legends of Carroll County, Maryland" was published by the Carroll County Library System, and has since gone into six printings. In 1998, "Ghosts and Legends" was updated. In 2001, this book, along with the Carroll County ghost walk, hosted by the Carroll County Library System, was deemed a "Local Legacy" by the Library of Congress. Moreover, his research into the life and death of Joseph Shaw, a Civil War era editor who was murdered in Westminster, Maryland, has resulted in two books as well as a collaboration with the Lithuanian composer Arturas Bumsteinas on a work of electronic music. "Ghosts and Legends" has become a standard work of Maryland Folklore, and is officially listed by the Maryland Humanities Council as such. In 2004, Glass, in collaboration with the Historical Society of Carroll County, Maryland and Meikai University, Japan, published "The Witness; Slavery in Nineteenth-Century Carroll County, Maryland" in a free, on-line edition, available as an e-book through Ahadada Books. This publication is the sole resource for the study of this subject.