Heaney, Seamus, Preoccupations: Selected Prose 1968—1978, Farrar, Straus and Giroux, 1980.

In this collection of essays, Heaney writes about his poetics and those of other poets, including William Wordsworth and W. B. Yeats. His essay "The Mixed Marriage: Paul Muldoon" focuses on Muldoon's second collection Mules.

Holland, Jack, Hope against History: The Course of Conflict in Northern Ireland, Henry Holt, 1999.

A journalist of Catholic and Protestant Northern Irish descent, Holland describes the thirty-year conflict in Northern Ireland known as the Troubles, tracing the history from 1969 through 1999.

Kendall, Tim, Paul Muldoon, Seren Books, 1996.

Kendall's study interprets Muldoon's poetry through Muldoon's The Annals of Chile, providing biographical information as well as information about Irish history and mythology.

Kendall, Tim, and Peter McDonald, eds., Paul Muldoon: Critical Essays, Liverpool University Press, 2004.

Scholars from Ireland, England, and the United States discuss Muldoon's work. Several of the essays began as papers...