Leo Lionni's Caldecott Honor-winning story about a little mouse who gathers something unusual for the long winter is turning fifty! Celebrate this beloved favorite, which now includes a special introduction from noted children's book historian Leonard Marcus. Winter is coming, and all the mice are gathering food . . . except for Frederick. But when the days grow short and the snow begins to fall, it's Frederick's stories that warm the hearts and spirits of his fellow field mice. Winner of a 1967 Caldecott Honor, Frederick has been cherished by generations of readers.