So then, I've found Tibor Dery's 'Niki - the story of a dog', published in English by Secker and Warburg in 1958.
A Hungarian from a prosperous background, the author sympathized with Communism up to a certain point in the 1950s when he began to satirize it. From what I can gather, he'd been both a popular figure in Hungarian culture, and then its outcast.
"On November 13th, 1957, the Supreme Hungarian Court pronounced sentence against four leading Hungarian writers, accused of "hostile activities during the events of November 1956 and subsequently aiming at 'overthrowing the order of the state.' "
I'm still reading this marvelous book, capturing, as it does, the paranoia and restrictiveness of a police state. The corrosion of the regime can only have occurred because some among the oppressed remembered to love, and remembered to report that love.