ZEB HOGAN is an ecologist whose aim is to protect critically endangered fish in vulnerable freshwater habitats. He is also the host of National Geographic Channel's Monster Fish. KATHLEEN WEIDNER ZOEHFELD is the award-winning author of more than 70 books for children, including What Lives in a Shell?, an NSTA/CBC Outstanding Science Trade Book for Children, and winner of the American Association for the Advancement of Science's Best Children's Book" award; What is the World Made of?, A Children's Book of the Month Club Main Selection; What's Alive?, also named an AAAS Best Children's Book; Dinosaur Tracks, "a great choice for even the most discriminating dinophiles" (School Library Journal); Dinosaurs Big and Small, winner of the Oppenheim Toy Portfolio Best Book Award; Dinosaur Parents, Dinosaur Young, an ALA Notable Book; and Secrets of the Garden, "a wonderfully informative and enjoyable journey through one family's backyard garden, from spring planting to fall harvest" (Kirkus).