Viktor Suvorov
According to an interview, Yuri Felshtinsky started collecting materials about the Russian apartment bombings in 1999, not thinking that the FSB had anything to do with the terrorism acts. He was deeply disturbed after discovering that the bombings were in fact committed by the FSB. He consulted with Viktor Suvorov, a writer and former GRU officer. When asked: "Would you personally blow out the building with innocent people after receiving the order?", Mr Suvorov replied: "Of course I would. That is our job. We always follow the order." Felshtinsky contacted Alexander Litvinenko who became a coauthor of the book. Felshtinsky had known Litvinenko since 1998.