Dread Wood

When classmates (but not mate-mates) Hallie, Angelo, Gustav and Naira are forced to come to school on a Saturday, they think things can't get much worse. But they're wrong. Things are about to get seriously scary. What has dragged their teacher underground? Why do the creepy caretakers keeping humming the tune to Itsy Bitsy Spider? And what horrors lurk in the shadows, getting stronger and meaner every minute? Cut off from help and in danger each...