AboutRachel Christian Expertise I can answer almost all questions regarding plot details and trivia in the books. I can also answer questions about the characters, their backgrounds, and information J. K. Rowling, the author, has posted about the books on her website. The only questions I can't answer are questions dealing with what happens in the next book, although I can point people in the right direction - namely sites like the-leaky-cauldron.org and mugglenet.com, which have compiled lists of all the known facts about Book 7, and spoilers and speculation lists.
Experience I have read all of the books repeatedly, and have read through most of the larger Harry Potter fansites for trivia and Book 7 information.
Question If there is something which can turn the time back, (remember in HP and prisoner of Azkaban), then why is it not used very often by Dumbledore to undo, if not all, then at least few major things that he did not want to happen, like saving Harry's Father for example.
Answer Well, there is no exact answer for this, although it has been a topic of debate among the fans for a while. Most people agree that one major reason Dumbledore (or anyone else) doesn't use the Time Turner to undo major events is that Time Turners only go back in time for a few hours - so unless the world-changing event was pretty obvious, no one would no that there was anything to change. Another reason Dumbledore doesn't use the Time Turner is that its use is pretty carefully regulated. The Ministry of Magic guards the Time Turners, and there are a lot of rules about using it. Also, from a more practical viewpoint, if Dumbledore had fixed every bad event in Wizarding history, the books would be really boring. xP.
