A short little book that gives background on well, evil, and accomplices to evil. We all know Lord Voldemort is EVIL. If you pay attention you know Dolores Umbridge is also EVIL. But there's someone in here that I would not have ranked in this book but... yeah, he caused some problems.
We get some good background on Umbridge and there's not much that makes anyone pity her. Just evil evil woman. The Ministers of Magic history is pretty interesting and there are some names that are very familiar!
History on Azkaban, polyjuice potion, cauldrons and potions fills in some space but I was pretty interested in Horace Slughorn. He seemed...kindly but a bit inept in the book and movie. But I see now that he wasn't inept, he was quite smart, and he was terrible inclusive and snobbish. His need to have his ideal students love him led him to reveal to Tom Riddle (aka Voldy) how to create Horcruxes (and we all know where that leads).
Another great little book with extra information on our favorite wizarding world.