The Witches by Roald Dahl. One of my favorite books ever. I read it in fourth grade and have loved it ever since. I still have a copy of it!
This Roald Dahl classic tells the scary, funny and imaginative tale of a seven-year-old boy who has a run-in with some real-life witches! "In fairy tales witches always wear silly black hats and black cloaks and they ride on broomsticks. But this is not a fairy tale. This is about REAL WITCHES. REAL WITCHES dress in ordinary clothes and look very much like ordinary women. They live in ordinary houses and they work in ordinary jobs. That is why they are so hard to catch." Witches, as our hero learns, hate children. With the help of a friend and his somewhat-magical grandmother, our hero tries to expose the witches before they dispose of him.