The Atlantic discusses Flann O’Brien’s work and legacy. (Though it mainly talks about his novels At-Swim Two Birds and The Third Policeman).
A rather nice blog post talking about The Poor Mouth.
Flann O’Brien wrote a column for The Irish Times for many years called Cruskeen Lawn – here’s one of the columns: On the many meanings of the Irish word ‘cur’
Robert Looby, ‘Flann O’Brien: A Postmodernist When It Was Neither Profitable Nor Popular’