He is the author of several non-fiction books, including:
* "Not On Our Watch": The Battle to Save Darfur" (2007): This book details his personal journey to help stop the genocide in Darfur, Sudan.
* "The Devil's Guest House: An American Doctor in Congo, the World's Deadliest Place" (2015): This book tells the story of Dr. Steven Van Zandt, an American doctor who worked in Congo during the Rwandan genocide.
Prendergast has also written numerous articles and essays on human rights and conflict issues for publications such as The New York Times, The Washington Post, and The Los Angeles Times.
While his work is primarily focused on non-fiction, his writings have a powerful narrative style and often bring to light the human stories behind complex conflicts.