HT4629: iTunes: About BooksLearn about iTunes: About Books
Currently Being ModeratedOct 4, 2012 2:31 PM (in response to Locke_Demosthenes)
Normally yes, you can buy anything in the iTunes Store except a gift for someone else. Perhaps something in this thread will help:
You may also be just getting the prompt to verify your payment method even though the iTunes Store wouldn't actually charge your card. That's not unusual if you have a card in your account even though you have a credit balance.