Corrected entry: When Harry gets the Advanced Potions Making book, "This Book is the Property of the Half-Blood Prince" is on the first page. A little later when Hermione and Ginny want Harry to turn the book in, Ginny grabs the book from Harry and looks at the last page and reads "This Book is the Property of the Half-Blood Prince".
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Correction: I don't see why this is a mistake. The Half-Blood Prince couldn't have labeled the first and last page of his old book?
Grumpy Scot