Conference "The Sleep of Reason Produces Monsters" was held at Collegium Witkowski, Jagiellonian University, Cracow. During 3 days (29. – 31. of May 2015) the delegates from various universities presented point of view from different fields of science including psychology, literature, anthropology, medicine, ethnology and so on. Thanks to the holistic approach the subject of demons and creatures was analysed in every detail. But in the same way question of the this idea in various civilisations is so many-sided and complex that this year event was only first one of future, cyclical meetings. We are glad that (according to Facebook) the conference was visited by more than 2500 enthusiasts of demons, vampires, werewolfs, incubs, deities and other supernatural beings.