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in the first book,harry is getting used to life as a wizard,he suddenly thrown into being world famous and everyone knowing his name,this is weird for harry as he spent his whole life being ignored by his family,harry gets in to trouble alot with out even meaning it and then at the end of book one he comes face to face with voldemort,the man that killed his parents,who was posing as a teacher in the school,he destroys voldemort..but not for long.