“The Fourth Door” is the first book about the adventures of Dr. Alan Twist, on the pages of which incredible events await the reader, bordering on real magic - murders in a locked room and criminals who leave no traces. A series of mysterious murders takes place in a small English village . First, the disfigured body of its owner is discovered in a locked room in the attic of the Darnley mansion. Since then, none of the tenants of this mansion have stayed in it for long. All because of the eerie atmosphere reigning there - the creaking of footsteps in the attic, the flickering light in the windows of an uninhabited room... However, for the Latimer couple, such a gloomy reputation of Darnley only plays into their hands - a better home for Alice Latimer, known for her talents as a medium, simply cannot be found. But the very first seance in the mansion ended in a brutal murder, which took place in the same locked and sealed room in the attic, and even with a body switch - in the place of the murdered man was a man who had been considered dead for several years! With each new chapter, the mysteries only become more , and events take on a mystical hue...