Codex Regius is a pen name and label of a pair of two authors from Slovenia and Germany, respectively. 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 authors of Codex Regius are married to each other and still trying to find a common language.