Ripped off version of Jane Yolen's "Wizard's Hall".
I had really enjoyed this book, and then it became sickeningly famous, my sister became obsessed, made loads of money as a series, and it got turned into a horrible movie.
If I were Jane Yolen, I'd be pissed, she probably has a dart set with J.K.Rowling's picture in the middle of the bulls-eye. With all that aside, I still love it.