dude, being this obsessed over spoilers is pathetic. you're compromising your lives and routines just to avoid knowledge of plot elements in children's books. if that doesn't merit abuse, i dunno what does!
Not only that it is a formulaic children's book!
Here is the plot:
1. Book starts with Harry on vacation. (Does he still live with his shitty british relatives? If so he is miserable, otherwise this is irrelevant).
2. Harry goes back to school but there is something shadowy and foreboding going on.
3. There is a new teacher for that one class, no one trusts him. Hermione sucks up to all her teachers.
4. Something bad happens, people blame Harry.
5. Hermione starts going all Scooby doo, no one listens to her.
6. Harry wins at soccer or cribbage or whatever the hell it is he plays.
7. He gets in more trouble for mysterious shit, he starts listening to Hermione.
8. They solve the mystery but get in some trouble with something evil/bad. Voldemort stuff etc.
9. Harry wins not because he is smart or well prepared or anything like that, but because he is lucky and the hero of the book even though he is just a rich, dumbass, lucky jock.
10. Someone dies or whatever, character development yadda yadda.
11. Everyone loves Harry again, the end.
Mind you I only read like 3 of the books, but this seemed to be the general plot of all of them.