where are my pre-ordered books in ios 7
I pre-ordered several books through the iBooks store and if I go back into the store it looks as though I never did. I would like to know where exactly I can find these located in my history, I have looked under the purchased tab and everything is there except for pre ordered books. I want to make sure a. I get my books when they come available and b. that I didn't hit the pre-order button multiple times and to get charged for the same book over and over again since I won't be charged until they are ready for download anyway. Thank you
iPad 2 Wi-Fi, iOS 7.0.2