Jonathan Tweet has been an innovative game designer for over 25 years and a fan of evolution for even longer. His award-winning games are well-known for engaging the players' imaginations and encouraging creative participation. Grandmother Fish, his first children's book, took 15 years to complete. It began when he couldn't find a book to help him teach his daughter about evolution, so he decided to write one himself. Karen Lewis is a Seattle-based illustrator for children's storybooks, history, and science. She strives to make her art accessible, accurate and visually delicious. She's the resident cartoonist for Cobblestone, an American history magazine for kids. Her children's books include Will it Blow - Become a Volcano Detective at Mount St. Helens, Amazing Alaska and Arturo and the Navidad Birds.