One June night, under the full moon, Daniel's mother wakes him up to see the extraordinary sight of horseshoe crabs spawning on the beach, just as they have every spring for an awesome 350 million years. But when Daniel returns in the morning, he finds only one lonely crab, marooned upside down in the sand. Can he possibly save it? Like a perfect day at the beach, Crab Moon leaves an indelible memory of a special adventure between parent and child, and a quiet message about doing our part to preserve even earth's oldest creatures. Back matter includes a note about horseshoe crabs.