Katie is a little girl who broods over the mother hen who is brooding her eggs. The illustrations follow the girl and the hen, who regard, with equally proud astonishment, the pile of eggs that will become chickens. The illustrator has done a very good job with Katie, has captured the expression of demented dedication that hens bring to their eggs, and shows, with scientific accuracy, the development within the eggs in border inserts at various points in the brooding and hatching time. Katie makes the mother hen as comfortable as she can and keeps off other poultry and animals. The publisher calls it an ""an easy-to-read science story about a little girl on a farm."" It is, and it's a good one, too.