GRAS Team - Group for the Investigation of Anomalous Situations. This is the name of one of the secret divisions of the FSB, which is engaged in the collection, analysis and investigation of non-standard situations associated with unusual properties of the human psyche, unstudied natural phenomena, and events of a military-political nature. In the new book of the writer Nikita Velikhanov, readers are presented with two action-packed detective stories - “Tunguska trace" and "Devastator". In the first of them, the investigation of the GRAS team is associated with anomalous phenomena in the area where the Tunguska meteorite fell, in the second - with the invention of a super-powerful secret device capable of destroying human civilization.