Fiction
* The Sleep of Reason (2006): This novel tells the story of a young woman who is haunted by dreams that portend death and terror.
* Asylum (2010): This psychological thriller follows the lives of the patients and staff of a psychiatric hospital.
* The Devil's Advocate (2012): This legal thriller features a lawyer who must defend a man accused of murdering his wife.
* Dark Descent (2015): This horror novel tells the story of a group of people who become trapped in a haunted house.
Nonfiction
* The Science of Horror: How Horror Works and Why We Like It (2009): This book explores the science behind why we enjoy horror movies and stories.
* The Psychology of Fear (2011): This book examines the psychology of fear and how it affects our lives.
* The Neuroscience of Horror: Exploring the Brain's Response to Fear (2014): This book investigates the neural mechanisms underlying our response to horror.
Short Stories
Metsios has published short stories in various magazines and anthologies, including:
* The Horror of It (2010)
* The Whispered Words (2011)
* The Dark Shadows (2012)
* The Night Terrors (2013)
Other Works
* Fear and Horror 101: A Guide for Writers (2008): This book provides tips and techniques for writing horror fiction.
* Writing Horror: A Guide for the Beginning Writer (2010): This book offers guidance for aspiring horror writers.