Toy books were introduced in the latter half of the 19th century, small paper bound books with art dominating the text. These had a larger proportion of pictures to words than earlier books, and many of their pictures were in color. The best of these were illustrated by the triumvirate of English illustrators Randolph Caldecott, Walter Crane, and Kate Greenaway whose association with colour printer and wood engraver Edmund Evans produced books of great quality. In the late 19th and early 20th century a small number of American and British artists made their living illustrating children's books, like Rose O'Neill, Arthur Rackham, Cicely Mary Barker, Willy Pogany, Edmund Dulac, W. Heath Robinson, Howard Pyle, or Charles Robinson. Generally, these illustrated books had eight to twelve pages of illustrated pictures or plates accompanying a classic children's storybook.
In 1913, Cupples & Leon published a series of 15 All About books, emulating the form and size of the Beatrix Potter books, All About Peter Rabbit, All About The Three Bears, All About Mother Goose, and All About Little Red Hen. The latter, along with several others, was illustrated by Johnny Gruelle. Wanda Gág's Millions of Cats was published in 1928 and became the first picture book to receive a Newbery Medal runner-up award. Wanda Gág followed with The Funny Thing in 1929, Snippy and Snappy in 1931, and then The ABC Bunny in 1933, which garnered her a second Newbery runner-up award.