My favorite number is four. My favorite character is Four (well, Number Nine and Sam too. My favorite book is I Am Number Four. Yes, there's a lot to the number four. Also fans of Divergent love the number four and Four.
Divergent * Insurgent * Allegiant * Veronica Roth did an excellent job with this series. The Audible version was great! I could not turn it off! If you liked Hunger Games you should love these!- putting it on my list of books to read.