I had read Montefiore before and wasn't impressed but this i would recommend. Set in 1940's Russia and concerns a group of innocent teenagers who, as a result of a murder/suicide, are investigated by Stalins secret police. Its an excellent portrayal of the paranoia and distrust that was rife at the time, and i was moved on a few occasions by the plight of the students and their families grief. Stalin really is a nasty character.