This is already looking good, but let me add
Albert Camus' "The Stranger", available legitimately here:
http://www.archive.org/details/TheStranger-AlbertCamus
Blurb form wikipedia:
"The Stranger or The Outsider (L’Étranger) is a novel by Albert Camus published in 1942. Its theme and outlook are often cited as examples of existentialism, though Camus did not consider himself an existentialist; in fact, its content explores various philosophical schools of thought, including (most prominently and specifically) absurdism, as well as determinism, nihilism, naturalism, and stoicism.
The title character is Meursault, an Algerian ("a citizen of France domiciled in North Africa, a man of the Mediterranean, an homme du midi yet one who hardly partakes of the traditional Mediterranean culture")[2] who seemingly irrationally kills an Arab man whom he recognises in French Algiers. The story is divided into two parts: Meursault's first-person narrative view before and after the murder, respectively."