"I sold my iPad for a new one and cannot restore the book. Wants me to buy it again. Absolutely rediculous." - I must retract this as it is wrong. Actually you can restore the in-app purchase and use it on multiple devices. I found out by going to apple store, deleting my credit card, and clicking on the "buy book for $89.99" as an in app purchase. A box popped up and said that I had already bought it and let me download it for free again. Thank God.
The I sent the app-store help people multiple emails and they were not helpful at all, and send out automated replies that were useless to me. I was forced to do the credit card deletion trick to figure it out.
mglass222 about Anesthesia Comprehensive Review