iTunes audiobook purchase not transferred to Library

I have purchased several audiobooks from iTunes and successfully downloaded them to my iPOD. I had a recent computer crash and lost my iTunes library. I reinstalled iTunes on a new machine and activated the "Check for Previous Purchases." All of my books were added to the new library except one. I went to my account history and checked the "Purchase History." The book in question is included in my purchase history along with the date of purchase. I have synched my iPOD with the new library but have lost this particular book. How do I recover it?