User Summary:
Dementia Profundis is a mix of scenarios and gamemaster aids with a common theme, madness.
The books contains chapters about dragons (their philosophy, their powers and their genocide by the forces of Good), roleplaying madness, the parallel universes known as the "Marches Intermédiaires", and five scenarios, "Mademoiselle, auriez vous du feu? ou Un Dragon, c'est vachement porteur !" for angels or demons, Tout chez moi l'habite! ou Un cadavre de trop" also for both factions, "Christophe lâche sa tête", "Verte campagne électorale" and "Jeux de Masques... à gaz", three small scenarios that need to be fleshed out by the gamemaster.