I've read Journey and Death, both in French while I was at school. There are some great lines from Journey I think of still. Can't remember much of the second -- after Black Swan's comment, I'll make a point of finding a copy and re-reading it. Tried Guignol's Band, but my argot was too weak and it was too much of a slog to read.
I'd recommend Ralph Manheim's translation, instead of the original one by John H. P. Marks - the latter is fine work, but was heavily censored when it came out in the 1930s, lest tender anglo ears be offended.