I was introduced to the work of John Dos Passos by my Dad. He told me, when I was a teenager, that the USA Trilogy by Dos Passos was his favourite book. It remains one of my favourites.
I have no idea when he had read it, though it was probably when he, my Uncle Terry, and their mate Pat Carmody lived together in London in the early 1950s (it was when he worked in a tyre factory near London that he first tasted ice-cold Coca-Cola from the classic bottle).
HERE is a great piece in the Paris Review on Dos Passos, that made me remember how good Dos Passos' work is.