is a 2011 novel by Irish journalist and author Paul Howard and the eleventh in the Ross O'Carroll-Kelly series.

The title refers to the National Asset Management Agency (NAMA) and to the Catherine Johnson stage musical Mamma Mia!.

[1] Author Paul Howard insisted that the novel's storyline — with Ross becoming the lover of an older Northern Irish woman — was not inspired by the Iris Robinson scandal, which became public knowledge in January 2010.

He becomes a "toy boy" for Regina Rathfriland, a wealthy older woman.

The Irish Independent reviewed it positively, saying "Howard has given Ross a new lease of life in this book and it's a testament to his skill not as a writer but as a keen observer of society that Nama Mia!