Over the Edge is an anthology of horror stories edited by American writer August Derleth. It was released in 1964 by Arkham House in an edition of 2,520 copies. The anthology was produced to mark the 25th anniversary of Arkham House. None of the stories had been previously published.
Chalker, Jack L.; Mark Owings (1998). The Science-Fantasy Publishers: A Bibliographic History, 1923-1998. Westminster, MD and Baltimore: Mirage Press, Ltd. p. 41.
Joshi, S.T. (1999). Sixty Years of Arkham House: A History and Bibliography. Sauk City, WI: Arkham House. p. 85. ISBN0-87054-176-5.
Nielsen, Leon (2004). Arkham House Books: A Collector's Guide. Jefferson, NC and London: McFarland & Company, Inc. p. 91. ISBN0-7864-1785-4.