Henry Louis Hasse (February 7, 1913 – May 20, 1977) was an American science fiction author and fan. He is probably known best for being the co-author of Ray Bradbury's first professionally published story, "Pendulum", which appeared in November 1941 in Super Science Stories.[1] Hasse co-authored two more published stories with Bradbury: "Gabriel's Horn" (1943) and "Final Victim" (1946).
^Both the original self-published story by Bradbury, "The Pendulum", and the 1941 co-authored revision, "Pendulum," appear in "The Collected Stories of Ray Bradbury: A Critical Edition, volume 1: 1938-1943, Kent State University Press, 2010. The 1943 and 1946 co-authored stories also appear in this book.