My nominations are:
In a Free State - V. S. Naipaul
https://en.wikipedia.org/wiki/In_a_Free_State
https://www.goodreads.com/book/show/...n_a_Free_State
The Story of Dr. Wassell - James Hilton
https://en.wikipedia.org/wiki/Corydon_M._Wassell
https://www.goodreads.com/book/show/...-of-dr-wassell
One Day in the Life of Ivan Denisovich - Aleksandr Solzhenitsyn (suggest Willets trans., else any other)
https://en.wikipedia.org/wiki/One_Da...%20distributed.
https://www.goodreads.com/book/show/...van_Denisovich
I read
In a Free State years ago but recall little of it except that I liked it - it has sat on my reread list for quite some time.