This book is a true study turned novel. Ethno-horror, the action of which takes place in the Leningrad region and St. Petersburg. Swamp moss, endless autumn fields, fogs, notes by unknown authors from the archives of rural libraries, deserted villages in the cold rain. A police officer confronted with an ancient evil. A Buddhist magician, secret experiments of fascists, frightening gypsy rituals and local historians-cultists on the banks of a once sacred river. Its course changes its movement in the same way as the course of the narrative. A mystery book that will forever change everyone who reads it to the end. The work contains obscene language in the language of the gypsies of the Leningrad region. Editor's comment: Here is an authentic mystical novel, from the very title to the final line, enveloping you with its dense verbal substance, like swamp moss foot caught in it. The author invites you to take a walk through the swamp of the past and see all the exhibits that sank in it. And how well they were preserved! After all, no one has disturbed the peace of the Green Dragon for a very long time.