* The Big Brother (2007)
* The Happiness of Sad People (2009)
* The God Equation (2012)
* Devil House (2014)
* Excision (2017)
* This Is Our Apocalypse (2018)
* An Unnecessary Woman (2021)
Non-Fiction Books:
* Real Enemies: Conspiracy Theories and America's Lost Tradition of Dissent (2011)
* This Little Life: Death and Grief in the Shadow of Alzheimer's (2019)
Short Story Collections:
* The Things I've Lost (2013)
* We Are Here Now (2020)
Essays and Journalism:
Olmstead has also written essays and articles for The New York Times Magazine, The Wall Street Journal, Harper's Magazine, The Believer, and Salon, among other publications.