The Horn Book, Inc. also published books for which Mahony was editor or co-editor. Those works include: Illustrators of Children's Books: 1744-1945 (1957), Newbery Medal Books: 1922-1955 (1955), and Caldecott Medal Books: 1938-1957 (1957).
The Horn Book, Inc. also published works that Mahony was responsible for editing or co-editing, such as: Illustrators of Children's Books: 1744-1945 (1957), Newbery Medal Books: 1922-1955 (1955), and Caldecott Medal Books: 1938-1957 (1957).