I just finished reading my favorite set of books of all time. The Bartimaeus Trilogy. These books are great. They are better than the Harry Potter books, but I don't think they are as good as the Eragon books. The first two books are about how this young magician steals two powerful, magic artifacts for the British government. The third book is how the magician uses those two artifacts to save the world. The third book has a great ending but you will just have to read the books to find out. (Note: The books are a little hard to get into, but when you do they are great.)
