Hardcover.

I hope that you enjoy the book--and thanks for coming to Bookcrossing.com! When you have a moment, I'd appreciate it if you'd write a journal entry to say where this book has gone next.
You don't have to join Bookcrossing to journal this book, but I encourage you to do so--and it's free! If you do join, you can list me, or any other member who journaled the book, as your referring member.