hermione2.0 you did not read the fifth one yet . Did it come out in your country or you didn't get it yet it is very interesting but like MarkEvans said there were somethings i just couldn't understand. But i read it again and it became a little clear harry was probably angry cuz of umbridge, his trial, his problems at home (aunt petuna) the stress of trilawny, and cho . People not believeing him . Semus and Dean , people's parent's telling their kids ot to asssociate with him cuz of all the stop printed about him in the Daily prophet , and percy a long list of stress so maybe that's why he was so allways angry