Judith Viorst is the author of the beloved Alexander and the Terrible, Horrible, No Good, Very Bad Day, which has sold some four million copies; the Lulu books, including Lulu and the Brontosaurus; the New York Times bestseller Necessary Losses; four musicals; and poetry for children and adults. Her most recent books of poetry include What Are You Glad About? What Are You Mad About? and Nearing Ninety. She lives in Washington, DC.

Arnold Lobel (1933–1987) was the award-winning author and illustrator of many beloved children’s books, including the classic I Can Read books about Frog and Toad, and the Caldecott Medal–winning Fables.