Is wavesong and the stone key by Isobelle carmody same book?

No, "Wavesong" and "The Stone Key" are not the same book. They are both written by Isobelle Carmody, but they are separate books.

* Wavesong is the first book in the "Obernewtyn" series, a fantasy series set in a post-apocalyptic world.

* The Stone Key is a standalone fantasy novel by Carmody, set in a world with magic and ancient mysteries.

While both books share Carmody's signature blend of fantasy, adventure, and strong female characters, they are distinct stories with different settings and characters.