Long Pond Cay, in the Bahamas, is a magical white-sand island, and twelve-year-old Trey and silent seven-year-old Lou love to visit its loneliness. But one day the magic becomes nightmare, and suddenly they are in another world, strident, polluted, and overcrowded - where little Lou is hailed not as a mute Bahamian boy but as the mythic hero Lugh, born to bring terrible destruction and renewal.

Carried between worlds on a zigzag adventure of mounting tension and danger, the children risk their lives not only to save the alien world, but to ward off a new, parallel threat to their beloved Long Pond Cay. The forces of myth and nature explode together in an amazing climax.

The riveting and startlingly original fantasy is Newbery Award-winning author Susan Cooper's eleventh novel for children. Green Boy evokes the lyrical beauty of the outer Bahamian islands with a disturbing vision of a spoiled world ominously like our own.