I chose Freakonomics as my book because I found that it peeked my interest. The questions on the back got me hooked right away. "Which is more dangerous, a gun or a swimming pool? What do schoolteachers and sumo wrestlers have in common? How much to parents really matter?" The book has facts that I did not know before and that I am surprised to learn. I would recommend this book to anyone of any age, sounds like it would be boring but it is very interesting.
Edit: I have just changed my book to the Lone Survivor, I find it to be a well rounded book and it just peeked my intres more than Freakonomics.