Above World, by Reese, Jenn.
Above world starts off ,under water with the Kampii where their breathing necklaces are failing. Aluna the main character then swims to the beach in the above world, with her best friend Hoku in tow. And that’s where the story starts…
I recommend this book for 8-11 years who like adventure.
Reviewed by Isabelle, 10 years old