HT2519: Download past purchasesLearn about Download past purchases
Currently Being ModeratedJul 12, 2012 2:14 AM (in response to happyhannah93)
Audiobooks are not currently available for repeat download so they won't show in the "Purchased" section of your account. You ought to have made a backup from which you could have restored all your content. There is no obligation on them to do so, but if you ask the iTunes Store support team nicely they might make an exception and requeue your missing content.