For those of you unfortunates (myself included) who have finished What Belongs to You and want more, Garth Greenwell has a wonderful homepage with links to other Bulgarian stories and to anecdotes about the composition, revision, publishing etc of his novel. There are also worthwhile non-fiction pieces, such as his Buzzfeed article on "How I Fell in Love with the Beautiful Art of Cruising."
Update: Greenwell had a fairly successful career as a poet before he ventured to Bulgaria and prose. The Beloit Poetry Journal published several of his poems. "Portrait with Hood and Bindings" is particularly striking.