For non-fiction, I would recommend ¨Mindset¨ by Carol Dweck.  Although written by a scientist, it is not too technical, and it is a fantastic book to apply to learn the attitudes that will make you more successful at a very wide variety of things.  Understanding ¨Mindset¨ should be greatly encouraging to you to persevere with tasks like learning languages.  Here is a link to some excerpts and things about it:  http://mindsetonline.com/whatisit/about/

I strongly recommend you Nicolas Sparks.  He has a lot of great lovestories, especially The Notebook.