JODI WHEELER-TOPPEN is a former teacher and the author of nine books and numerous articles for teachers and students. She holds a Ph.D. in science education from the University of Georgia and conducts teacher workshops on science and literacy. RACHEL FULLER, freelance illustrator, works as part of a co-operative called Studio Greenhouse, which she helped set up in 2004. In addition to studying at Reigate Art College and Camberwell in London, she graduated from Brighton University with a B.A. in Graphic Design. Rachel has worked for major publishers including Macmillan, Tango Books, Child's Play, Emma Treehouse, A&C Black, Cowley Robinson, Oxford University Press, and more. She is also an active member of Brighton Illustrators Group.