Harry Potter and the Methods of Rationality : Harry Potter will not stay the same after you read this
Harry Potter and the Methods of Rationality imagines Harry Potter having an Oxford professor(something related to oxford) as a foster parent rather than the Dursleys. He also reads Science Fiction. Harry as a result of this upbringing learns to question everything. When he gets an invitation from Hogwarts he applies logic, deduction and what not to the magical universe. He asks a lot of questions that I did at the time. Why do the wand movements, the enunciation of the spells matter so much? Why does everything to do with magic have to be so precise, so measured? It takes a lot of the concepts of Harry Potter and twists them around. Time Travel, the nature of magic, spells are all dissected. Along the way the Stanford Prison Experiment, reasoning from negatives all find their way. If you a are a quidditch fan(which includes me) be ready to have it crumpled up and thrown into a waste paper basket. A fantastic read. Download the book here (It is fanfiction so no legal issues)