Nobel Laureate Seamus Heaney, author of nine collections of poetry and three volumes of influential essays, is regarded by many as the greatest Irish poet since Yeats.Passage to the Center is the most comprehensive critical treatment to date on Heaney's poetry and the first to study Heaney's entire body of work. It is also the first to examine the poems from the perspective of religion, one of Heaney's guiding preoccupations.According to Daniel Tobin, the growth of Heaney's poetry may be charted through the recurrent figure of "the center", a key image in the relationship that evolved over time between the poet and his inherited place, an evolution that involved the continual re-evaluation and re-vision of imaginative boundaries.