Millicent Selsam was a popular childrens science writer whose work includes Egg to Chick, a Reading Rainbow book illustrated by Barbara Wolff, and Gregs Microscope, illustrated by Arnold Lobel. Marlene Hill Donnelly is a staff artist at the Field Museum of Natural History in Chicago. Arnold Lobel (1933-1987) illustrated many wonderful children's books but is most beloved for his Frog and Toad stories, including the first one, Frog and Toad Are Friends, published in 1970. The books have garnered much acclaim, including a Caldecott Honor for Frog and Toad Are Friends and a Newbery Honor for Frog and Toad Together. These were followed by Frog and Toad All Year and Days with Frog and Toad.