Amulet. Book 2

Emily and Navin's mother is still in a coma from the arachnopod'spoison, and there's only one place to find help: Kanalis, the beautifulcity of waterfalls. But when Em, her brother, and Miskitand the rest of the robotic crew aboard the walking house reach thecity, they quickly realize that seeking help is looking for trouble,dangerous trouble.