Codex Regius is the pseudonym and label of a pair of two authors from Slovenia and Germany, respectively. They are also using the label 'Romanike' for their series of historical novels set in the Roman Empire. One author is a university engineer of chemistry and, before both set up a freelance translation business, has spent her time trying to convey the wonders of the Periodic Table to mostly unreceptive students. The other is a graduate of physical engineering and former technical editor. Both are working from home, which the children find very convenient when they come from school. The two