Borges is what actually got me interesting in literary criticism -- because of the nature of his output, it's actually possible to read nearly all of his major work (poetry and nonfiction included). This makes reading lit-crit about him infinitely more satisfying. If you're remotely interested, I'd highly recommend "The Narrow Act", "Invisible Work", and particularly "The Mystery To A Solution", though this last one also requires a lot of Poe and even more patience.