Step into the wild side of the African Savanna as Detective Swifty, the adorable, clever swift fox, and his loyal, trustworthy prairie dog pal Gus solve yet another mystery! This time, the mystery takes Detective Swifty and Gus to the Tropical Grasslands of the African Savanna as they help the local music choir director Mr. Ivor E. Hornsby the Black Rhino solve the case of the mysterious howls in the night! This educational storybook introduces the reader to several endangered species of the Tropical Grasslands biome, but also provides interesting facts about each animal, place, or thing introduced in "Knowledge Boxes" that are scattered throughout the book!