Mr S and the Secrets of Andorra's Box is a 2008 novel by Irish journalist and author Paul Howard, and the eighth in the Ross O'Carroll-Kelly series.

"Mr S" is Frank Sinatra, who Ross' father drank with one night in the Shelbourne Hotel.

[4] Ross becomes the coach of the Andorra national rugby union team.

[5] In the Irish Independent, Anne Marie Scanlon wrote, "Ross is a monster, but one who consistently entertains us, and maybe it is the Irish obsession with the craic that makes Mr O'Carroll Kelly such an unfailingly welcome character," describing the book as "spot-on social satire.

"[6] In The Irish Times, Kevin Power praised Howard's "flawless ear for the verbal self-betrayals of our prosperous middle class […] This is more than an extraordinary comic gift; it is a way of talking seriously about character and social standing."