Michael Grant
Twelve-year-old Mack MacAvoy suffers from a serious case of mediumness. Medium looks. Medium grades. Medium parents who barely notice him. With a list of phobias that could make anyone crazy, Mack never would have guessed that he is destined for a more-than-medium life.
And then, one day, something incredibly strange happens to Mack. A three-thousand-year-old man named Grimluk appears in the boys' bathroom to deliver some startling news:
...In the thrilling second book of the Magnificent 12 series, Mack MacAvoy is challenged by his spectral mentor, Grimluk—who only appears in the shiny chrome pipes of bathrooms.
Mack must find the ancient ones, the great forgotten forces. Some will help; some not so much. But above all—