Only four stars since this is not for the general reader. Five stars for anyone really interested.
This is a chronicle, published in 1972, of events in the Soviet Union mostly in the late 1960s, during the Khrushchev era. Things improved there after Stalin's death in 1953, but were still horrible. Although most prisoners were released from Stalin's unspeakably cruel prison camps, where the overwhelming majority were innocent, that left many mostly innocent millions still enslaved under about the same conditions. Then in the late 1960's, as opposition began to grow, largely from writers and humanists such as Aleksandr Solzhenitsyn, a growing neoStalinist reaction emerged to make conditions worse.
The prime mode of the growing dissent about Soviet outrages was Samizdat, the reproduction of underground publications, sometimes hand-copied, passed from person to person so as to avoid official censorship and discovery by the KGB. This chronical is a compilations of some Samizdat, which amounted to a type of journalism dealing only in facts, including letters of complaint sent openly to authorities (always ignored, at best) and details of arrests and trials, and several acts of genocide by the Soviet regime. And some effects of these on immediate victims and on life in the USSR. It is amazing that so much of this information made it out of there. Collecting and transmitting it cost many good people dearly.