What is the difference between a Newbery Medal winner and a Newbery Honor Book?
The John Newbery Medal has been awarded every year since 1922. It is given to "the author of the most distinguished contribution to American literature for children published in English in the United States during the preceding year." There is only one such award each year. However, there are generally other books that were strong contenders, worthy of recognition. These runners-up—usually between one and five in a given year—are honored as Newbery Honor Books.
—The Fact Monster