Kickstarter does not prompt you to give us your shipping address until the project is fully funded. If the project is successful, your card will be charged and we will send out requests for you to provide us your shipping address.
There are currently two tiers: $30 for 1 book and $55 for 2. If you would like to purchase more than 2 books, choose one of those tiers, and provide us with the proper amount of money that corresponds to how many books you want. Then, in your pledge, add a note that tells us how many books you pledged for and expect to receive.