Michiko Kakutani in The New York Times wrote that his "elliptical narrative style recalls works by D. M. Thomas, Paul Auster, Sam Shepard and Vladimir Nabokov.
[13] In 2012, Cooper wrote a series of controversial articles for the Huffington Post, highly critical of PETA (People for the Ethical Treatment of Animals), and in support of the No Kill movement.
"[17] James Polk, in a second The New York Times review, called Amnesia "a dense, absorbing first novel (which) locates prominent features in the landscapes of mind and memory.
[20] The Boston Globe called Cooper "ambitious", and noted that he "takes us on a journey through the dark corridors of the psyche, introducing us to characters who change shape as easily as smoke rings.
The New York Times observed that Cooper "invents an underground city of the dead and the disenfranchised that suggests the night visions in The Crying of Lot 49 (by Thomas Pynchon).
[23] Milrose Munce and the Den of Professional Help (2007) is a gothic novel for young adults about a pair of flamboyant teenagers who can see and converse with dead students, and their war with the school psychologist who is set on convincing them that they cannot.
The novel became a surprise bestseller when it was accidentally published in Amazon Kindle format by Doubleday,[24] and was subsequently deemed a "2008 Book of the Year" by the United Kingdom's Love Reading 4 Kids.