The first to describe 1900–1935 as science fiction's "Radium Age," Joshua Glenn is editor of the MIT Press's series of reissued proto-sf novels and stories from that period. Josh is a consulting semiotician and editor of the websites HILOBROW and SEMIOVOX. He is co-author of The Adventurer's Glossary (McGill-Queen's University Press, 2021) and co-editor of Lost Objects (Hat & Beard Press, 2022), among other titles.