Polar Bear, Polar Bear, What Do You Hear is another book featuring Eric Carle's unique and exquisite illustrations. The author, Bill Martin Jr. is a writer of many children's books, such as Brown Bear, Brown Bear, What Do You See? Eric Carle illustrates his books through the collage method, where he paints tissue paper by hand and then cuts and pastes them to form the illustrations of animals, people and scenery in these children's books. Eric Carle has also written some of his own stories, such as The Very Hungry Caterpillar and The Very Quiet Cricket . Polar Bear, Polar Bear, What Do You Hear? is written for children ages 2 through 8 and has a poetic rhyme so catchy that your children will be "reading" the book to you in no time. Plus, it gives children the opportunity to make animal sounds, which always makes a book a winner.