Just finished reading USA by John Dos Passos.
It's a massive modernist trilogy that attempts to capture the 'voice' of American history from 1900 through 1930 (from Dos Passos' leftist point of view, written between the years 1927-1936) with several different styles of prose and a dozen interwoven storylines. If you have any interest in the history and culture of the US from that period it's fantastic and I cannot recommend it highly enough.