Anne Carson's best book?

Ben Ratliff in the New York Times Book Review thinks so:

Anne Carson’s new book comes in a box the color of a rainy day, with a sliver of a family snapshot on the front. Inside is a Xerox-quality reproduction of a notebook, made after the death of her brother, including text and photographs and letters, pasted-in inkjet printouts, handwriting, paintings and collage. “Nox” has no page numbers, and it’s accordion-folded. It carries a whiff of visual art multiple or gift shop souvenir or “Griffin & Sabine.” But trust me: it’s an Anne Carson book. Maybe her best . . .