John Steinbeck's East of Eden is from 1952, and on Archive.org [0], I assume that is the one? It's not on Gutenberg (as a nice epub), but there is another one from Isa Glenn [1]. Since Netflix has a miniseries based on Steinbeck's novel I'm going to assume it's that one :)
[0] https://archive.org/details/eastofeden0000john_p8l1/mode/2up