Book excerpt: One of the earliest great stories of English literature after ?Beowulf?, ?Sir Gawain? is the strange tale of a green knight on a green horse, who rudely interrupts King Arthur's Round Table festivities one Yuletide, challenging the knights to a wager. Simon Armitrage, one of Britain's leading poets, has produced an inventive and groundbreaking translation that " helps] liberate ?Gawain ?from academia" (?Sunday Telegraph?).