Oliver's Magic (Book 3): Dark Wizardry

Oliver Augur found out he was a wizard only weeks ago, and since then his life has been turned completely upside down. His uncle Al, who he never knew existed, took him on as an apprentice, teaching him everything he knew about magic. The only problem was that learning basic magic was boring, so Oliver wanted to learn something a little more exciting, which prompted him to study more advanced magic on his own. Oliver didn't know what he was doing, one thing led to another, and then he and his uncle had to leave town to find Oliver's grandfather--the most evil wizard Oliver knew of. They traveled to his home, only to be cornered by him. Now, they are trapped in his home, and Oliver is the only one who can now save himself, his uncle, and his long lost father. Now all Oliver can think to ask himself is, "Do I have what it takes?"