Preacher was an adaptation of the comic book written by the writer of what nationality?
Preacher (TV series):  It is an adaptation of the comic book series "Preacher" created by Garth Ennis and Steve Dillon, and published by DC Comics' Vertigo imprint. Garth Ennis: Garth Ennis (born 16 January 1970) is a Northern Irish-born naturalized American comics writer, best known for the Vertigo series "Preacher" with artist Steve Dillon and his successful nine-year run on Marvel Comics' Punisher franchise.
Northern Irish