Dale Clarke completed his PhD at Cranfield University, and his Masters at De Montfort University. His specialist area of interest is the application of technology to warfare, and he takes a 'hands-on' approach, being involved in various restoration projects and having experience as an armourer and technical advisor in film and television. A reservist officer in the Royal Artillery, he has served with the British Army in Iraq and Afghanistan.
Brian Delf began his career working producing artwork for advertising and commercial publications. Since 1972, he has worked as a freelance illustrator on a variety of subjects including natural history, architecture and technical cutaways. Books he has illustrated have been published in over thirty countries. Brian lives and works in Oxfordshire.