3 for 2

I went to look at books today, coz it makes me feel happy. And I ended up buying some. Normal I don't pay full price for books. I prefer pre-loved books and usually don't spend more then $10 on one. I only ever buy new books if I can't live without them (ie the new Obernewtyn Chrionicle/Harry Potter etc). So, I was looking around and noticed that they had the following books that are one my list of books to read:

I bought 2 and got the 3rd FREE!!! How nice.



I can't wait to start reading them. I just need to choose which one to start first ... hmmm any suggestions?