A culture is no better than its woods,” Auden writes. Fortunately for him, a book of poetry can be better than its poems. Two-thirds of The Shield of Achilles is non-Euclidean needlepoint, a man sitting on a chaise longue juggling four cups, four saucers, four sugar lumps, and the round-square: this is what great and good poets do when they don't even bother to write great and good poems, now that they've learned that-it's Auden's leitmotif, these days-art is essentially frivolous. But a little of the time Auden is essentially serious, and the rest of the time he's so witty, intelligent, and individual, so angelically skillful, that one reads with despairing enthusiasm, and enjoys Auden's most complacently self-indulgent idiosyncrasy almost as one enjoys Sherlock Holmes's writing Victoria Rex on the wall in bullet holes.