I would say, browse the titles at a bookstore or library and if something looks interesting to you, get it and read it.
Or, if you have an ereader, browse Amazon's website. There are lots of free books you can download.
(Project Gutenberg) has a lot of free books, you can download or read online (text). Just browse and choose whatever sounds interesting.
Maybe some of the books you won't enjoy, maybe some you will enjoy. But all of the books will help you practice.