At Crystal's request, I ordered Harry Potter and the Deathly Hallows from Amazon, to be delivered Saturday morning, July 21st. As soon as the book arrived, Crystal began reading it nearly non-stop, and had most of it finished by midnight. She would have gone on to finish it in the early hours of the morning, but I persuaded her to put down the book and resume the next day with fresh eyes and a rested brain.
Upon waking, she picked up the book again and went on to finish the whole thing an hour later.
As to how the entire Harry Potter series ended, I was disappointed that my own theory didn't pan out. I was so SURE that Voldemort was going to declare to Harry that he is indeed his father, and urge him to join together so they could rule the galaxy as gay father and son. Oh, well.