This guide to language takes readers on a trip of the tongue, exploring how languages - spoken, written and sign - originate and change over time. AGES: 8-12 AUTHOR: Jude Isabella is a science writer based in Victoria, British Columbia. She was the managing editor of YES Mag, Canada's science magazine for kids, for 12 years. She also wrote the magazine's four science books for kids, including "Fantastic Feats and Failures", which won the American Institute of Physics Award for writing for children. Kathy Boake is an illustrator and fine artist. Her work has appeared in many publications, such as InStyle, Seventeen, Vancouver, Toronto Life, Outside, Chirp, chickaDEE and OWL magazines. She has won numerous awards from the Art Directors Club of Canada, the Society of Graphic Designers of Canada, and the Western and National Magazine Awards Foundations. She has also illustrated several books, including "You Are Weird" by Diane Swanson. Colour illustrations