Read the Harry Potter series, just do it! i'm sad to say it took me this long to read them. they are so amazing! plus there is another on the way to be released at the end of july! what better time to read these awesome books!
This is funny, but I always got the implication from the books that there had been people trying out for Seeker, but none of them had been very good. So McGonagall stepped in because she loves her House team.