Free ebooks in French for beginners / Livres gratuits pour apprendre le français
Here's a list of free ebooks with some popular books to start reading in French, they might not be for absolute beginners but they're classics and will help you to understand more about French culture. I hope it helps!
Un coeur simple http://www.gutenberg.org/cache/epub/26812/pg26812-images.html
Free is good. Thanks for posting. I have read Le Petit Prince and Candide. The first one is okay for beginners, but I think the second one will be a bit more challenging.
I'm not familiar with the other two. Oh, I just took a look at Huis Clos. It's a one-act play by Sartre. That guy was super weird, but entertaining. This one seems like a fairly easy read. I managed to get through the first scene in a few minutes but I had to look up a couple of words. The humor is dry, but not too predictable.
You certainly have interesting tastes in literature :)