If you got a book mailed to you as a backer, you should have gotten two emails- one on the 29th, when I placed the order, and the other whenever the book shipped. The latter should have a tracking number. Both emails would be sent to whatever address you have lodged with Kickstarter.The tracking number where did you find it?
You can also find it in your account tab on Drivethru under My Orders. If you find the order and click the "View" button it will bring up the particulars of that order, including the Order History. Mine looked kind of like this:The tracking number where did you find it?