The release of a new Harry Potter film always means a deluge of complaints about how it failed to exactly duplicate every single word of J.K. Rowling's sacred text, and Half-Blood Prince is no different. (Adam Quigley from Always Watching tweeted this amusing screenshot of the IMDb message boards Wednesday morning that sums it up pretty well.) Not having read the book since it came out four years ago, I didn't remember it in great enough detail to notice any major changes in the movie -- until the climactic scene in the tower, when something did stand out. And it stands out as an improvement over the book.

Spoilers for the book and the movie follow!

As readers well remember, that scene has Draco Malfoy confronting Dumbledore with the intention of killing him, as ordered by Voldemort. In the book, Harry is under the invisibility cloak at this point, so no one knows he's there, and Dumbledore has stupefied him so he can't act. Then the Death Eaters and Snape come along, and Snape finishes the job that Draco can't muster the courage to perform. Harry is powerless to do anything until Dumbledore is dead, which cancels the stupefying spell.

The movie plays out essentially the same way but with one key difference. Instead of being stupefied and invisible, Harry is hiding silently below the floor where the action is happening. Why? Because Dumbledore told him to, having already extracted from Harry a promise that he would obey whatever directions Dumbledore gave him.

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