Dia L. Michels is an award-winning science and parenting writer who has authored or edited over a dozen books for both children and adults. While her topics include science and math books for middle grade students, her passion is promoting attachment parenting and supporting breastfeeding. A popular speaker, she lectures frequently at conferences, universities, libraries, and schools around the country. The mother of three grown children, she lives in the Capitol Hill neighborhood of Washington, D.C., with five cats and a dog. She can be reached at Dia@PlatypusMedia.com.

Growing up in the home of a physician, Bonnie Hofkin's first picture books and early readers were medical journals and anatomy texts. With her interest in the human body thus igniting a lifelong love of art, she first obtained a BA in commercial illustration, followed by a master's degree in medical illustration. Subsequently, she embarked on a 40+ year career as a freelance illustrator. Still going strong, her unique style, in which an eye for accuracy and visual appeal is combined with a classical look reminiscent of the great Renaissance masters, is instantly recognizable.