Songju Ma Daemicke grew up in Jilin, China, where she enjoyed listening to the stories her grandparents told. Songju moved to the United States in 1996. After obtaining a master's degree in computer science, she worked as a software engineer until her twin daughters were born. Songju has always excelled in math and has recently gravitated back to her early love of literature and stories. Her books, Cao Chong Weighs an Elephant and A Case of Sense were inspired by stories her grandfather told her as a child. Songju lives in Illinois with her husband and their daughters. Visit her website at www.songjumadaemicke.com. In addition to Cao Chong Weighs an Elephant, Christina Wald has illustrated Cash Kat, Fibonacci Zoo, A Cool Summer Tail, A Warm Winter Tail, The Fort on Fourth Street: a Story about Six Simple Machines, Habitat Spy, Henry the Impatient Heron, and Little Red Bat for Arbordale. She also enjoys illustrating for a wide variety of toys, games, books, and magazines. Christina enjoys the research aspect of such projects, saying that each new book is a fascinating new learning experience. She often integrates travel to research for her illustrations. She lives in Ohio with her husband and three cats. Visit Christina's website at www.christinawald.com.