Half Blood Prince. Spoilers. Beware, ye who enter here.

Finished! (Hey, I didn't get my book at midnight like some, and then we went shopping, and had dinner, and saw a movie...)

( Spoiler: Light )

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( Spoiler: Big )

( Spoiler: Medium-sized )

So in short, Ginny dies, Lupin's a spy for Voldemort, and the Half-Blood Prince is Hagrid. Bwa ha ha.