Atelier Marie, Elie & Anis: Message on the Gentle Breeze

The two alchemists Marlone (most commonly refered to as "Marie") and Elfir "Elie" Traum run a workshop together on the Artisan's Way in the city of Salburg. It's not a big business, but their reputation is steadily going up. One day, their past teacher Ingrid requests them to write books for the new library that is being built. The library will be finished in 5 years, so they are requested to write at least one book every year during that time.