Kazu Kibuishi's #1 New York Times bestselling graphic novel series continues!Emily and Navin's mother is still in a coma from the arachnopod's poison, and there's only one place to find help: Kanalis, the bustling, beautiful city of waterfalls. But when Em, Navin, Miskit, and the rest of the robotic crew aboard the walking house reach the city, they quickly realize that seeking help means looking for trouble...dangerous trouble.