Ó Muirí has published four collections of short stories and a longer work called Ré (Epoch). He was granted a bursary of 10,000 euros by the Arts Council of Ireland to aid him in his literary work. His collection Cogaí (Wars) won an important literary prize in 2001 in the Cló Iar-Chonnacht Literary Award Competition. The adjudicators referred to the savagery and vitality of the writing.[2]
His work has been praised for its assured and engaging style and its surrealistic atmosphere.[3]