A terrible drought was threatening to wipe out Stands-by-Herself's Cheyenne people. One day, all alone on the Great Plains, she came upon a strange egg-shaped rock, and took it home. "That looks like a thunder egg!" her grandmother said. Laid by the great Thunderbird's wife, could Stands-by-Herself's strange rock hold the key to her people's survival? Filled with vibrant and colorful illustrations, The Thunder Egg brings to life the bygone age of the unspoiled West.