Pauline Diana Baynes was an English illustrator, author, and commercial artist. She contributed drawings and paintings to more than 200 books, mostly in the children's genre. She was the first illustrator of some of J. R. R. Tolkien's minor works, including Farmer Giles of Ham, Smith of Wootton Major, and The Adventures of Tom Bombadil. She became well-known for her cover illustrations for The Hobbit and The Lord of the Rings, and for her poster map with inset illustrations, A Map of Middle-earth. She illustrated all seven volumes of C. S. Lewis's Chronicles of Narnia, from the first book, The Lion, the Witch and the Wardrobe. Gaining a reputation as the "Narnia artist", she illustratred spinoffs like Brian Sibley's The Land of Narnia. In addition to work for other authors, including illustrating Roger Lancelyn Green's The Tales of Troy and Iona and Peter Opie's books of nursery rhymes, Baynes created some 600 illustrations for Grant Uden's A Dictionary of Chivalry, for which she won the Kate Greenaway Medal. Late in her life she began to write and illustrate her own books, with animal or Biblical themes.

The Adventures of Tom Bombadil is a 1962 collection of poetry by J. R. R. Tolkien. The book contains 16 poems, two of which feature Tom Bombadil, a character encountered by Frodo Baggins in The Lord of the Rings. The rest of the poems are an assortment of bestiary verse and fairy tale rhyme. Three of the poems appear in The Lord of the Rings as well. The book is part of Tolkien's Middle-earth legendarium.