Poppy and the Sky Aquarium

Poppy Harrington has spent her life studying the tides, preserving harbor records, and trusting the measurements that keep her coastal world in order. But when the mercury column in her grandmother’s archive plunges without warning, Poppy follows a strange, singing copper cable into the clouds-and discovers a colossal floating conservatory twelve thousand feet above the sea.

Inside the Sky Aquarium, impossible spheres of water drift through a cathedral of brass and glass, each contain…