Burly Black appears in the short story Son of Magic, written by Haley Riordan, in The Demigod Diaries.
Son of Magic
Black was the owner of a coffee shop that was frequented by Dr. Howard Claymore, and was Claymore's only friend. He is killed by Lamia, who uses a spell to set fire to Black and then burns down his shop.
He is said to be bulky, and would fit right in at a biker gang. He also wears a Kiss the Cook apron.