About Fish / Sobre los pecesBy: Cathryn Sill Illustrator: John Sill Series: About. . . This award winning beginner's guide to the natural world of fish from the creators of the About series was named an "NSTA Recommends" book. Noted educator and author Cathryn Sill uses simple, easy to understand language to teach children the basic characteristics of what fish are, how they swim, breathe, and reproduce, and explains the different ways they protect themselves from predators.