Try getting a copy of short stories by Guy de Maupassant. They are interesting stories, and I don't recall them being too difficult. As a bonus, you can download them from
http://www.gutenberg.org/browse/authors/m#a306
as they are public domain books, and download a translation as well in case you have any problems understanding something. I also second the Candide recommendation, great book, easy to read, and you will pick up some new vocab along the way. If I think of anything else later I'll post it up here. Best of luck.