Ista Flit and the Impossible Key (Tidemagic #2)

In book two of this middle-grade fantasy trilogy, Ista Flit — a daring heroine with the magical ability to look like anyone she's ever seen — must help her father escape from an enchanted trap.

In her first adventure, Ista Flit and her friends saved the town of Shelwich from a monstrous foe—but her father is still missing.

She has a new clue though: a key, engraved with mysterious symbols, and a note saying "any door with a keyhole will do."

This key transports Ista, Nat, and Ruby to Glass Island—where creatures Ista thought were mythical turn out to be very, very real. A sinister wraith haunts the reed-beds, and deviously seductive, fairy-like marsh spinners lure people in to dance at their revels—and never let them go.