While I would read and cherish anything that W.S. Merwin writes, this, to me, is one of his best collections of poems. The entire collection is comprised of apostrophe poems (first-person poems addressed to a specific person, idea, or thing--concrete or abstraction). Each poem is about as concise as a poem can be yet packed with layer upon layer of meaning.
One of my favorites is "To the Margin." It speaks of the love of text, words--both for writers and readers.
The poems are so humble, so simple in their discourse, that one will be stunned by their connotative depth. THE BEST!