* The Dream Room (2003)
* Our Lady of the Islands (2011)
* In Search of the Blue Flower (2015)
* Into the Maelstrom (2018)
Short Story Collections:
* The House of the One Hundred Eyes and Other Stories (2004)
* The Apocalyptic Symphony and Other Stories (2008)
* The Bloodless Child (2012)
* Stories from the Wasteland: Volume 1 (2013)
* Stories from the Wasteland: Volume 2 (2014)
Non-Fiction:
* Strange Elixirs and Ghostly Apparitions: The Poetics of Arthur Machen (2009)
* The Weirdness Within: Explorations of the Weird in Literature and Music (2012)
* In Search of the Fantastic: Essays on Horror and Weird Fiction (2014)
* Horror Literature: A Reader's Guide (2015)
* The Gothic Imagination: Essays on Dark Romanticism and Horror Literature (2017)
Anthologies Edited:
* The Mammoth Book of Ghost Stories (2010)
* The Mammoth Book of Zombie Stories (2011)
* The Mammoth Book of Vampire Stories (2012)
* The Mammoth Book of Werewolf Stories (2013)
* The Mammoth Book of Horror Stories (2014)
* The Mammoth Book of Science Fiction Stories (2015)
* The Mammoth Book of Modern Fantasy Stories (2016)
* The Mammoth Book of Classic Fantasy Stories (2017)
Novellas:
* The White Hand (2007)
* The House on the Cliff (2009)
* The Sea that Shines (2010)
* The Ghosts of New York (2013)
* The Shadow of the Tower (2016)
* The Watcher in the Woods (2017)
Audiobooks:
* The Dream Room (2010)
* Our Lady of the Islands (2012)
* In Search of the Blue Flower (2016)
* Into the Maelstrom (2019)