Bernard O’Donoghue 
Seamus Heaney and the Language Of Poetry [PDF ebook] 

This book scrutinizes Heaney’s language in order to examine his theory of poetry and the writer’s responsibility to art and politics. The author, himself a poet, works chronologically through the poetry and discusses it in light of Heaney’s writings on the appropriate language of poetry. Chapters also look at Heaney’s language and at the government of the tongue.