Dan Cowling currently teaches heography and is Head of Year at Charters School in Sunningdale. He is a recognized Chartered Geographer (Teacher) by the Royal Geographical Society and a member of the Geographical Association. He has taught geography for 15 years, has written numerous textbooks, and works as a senior examiner for Edexcel. He lives in Middlesex, United Kingdom.

Mark Franklin joined the prestigious School of Technical Illustration at Bournemouth & Poole College of Art & Design in 1981 and was introduced to the photo-realist movement in Pop Art. Influenced by Philip Castle and Michael English, among others, he mastered the art of airbrush illustration, along with the exacting geometry of perspective theory. Graduating in 1985, Mark moved to London to work as a freelance illustrator. Mark has been providing airbrush and digital art to a variety of media, print, publishing, and advertising clients for more than 20 years. He lives and works in London.