Ida Vitale. Pre-textos, 2010.
This book is by the Uruguayan poet Ida Vitale. A bird (a rook) complains in a tree; a cat, inside, wants to get outside to get the bird; a third element, a person observing bird and cat; a fourth layer is the reader of the poem, trying to understand the triangular relationship between these three "languages." Conceptually, that is an amazing poem.