Bob has written/co-written fifteen of the eighteen 'What They Don't Tell You About' series and always produces interesting text and lively, humorous illustrations. He is the author of 'Who's Who in British History' and 'Who's Who in Science and Technology', as well as the four 'Who? What? When?' books; 'Tudors', 'Victorians', 'World War I' and 'World War II'.