A number of books were written about the Spetsnaz GRU, the best known of these being "Aquarium" by Viktor Suvorov, a GRU agent who defected to the West.
A number of books were written about the Spetsnaz GRU. The best known of these being "Aquarium" by Viktor Suvorov was the Spetsnaz GRU. Viktor Suvorov was a GRU agent. This GRU agent defected to the West.