EDWARD EAGER(1911 1964) worked primarily as a playwright and lyricist. It wasn't until 1951, while searching for books to read to his young son, Fritz, that he began writing children's stories. His classic Tales of Magic series started with the best-selling Half Magic, published in 1954. In each of his books he carefully acknowledges his indebtedness to E. Nesbit, whom he considered the best children's writer of all time "so that any child who likes my books and doesn't know hers may be led back to the master of us all."