This is an excellent stand-alone book in this series. You get the backstory for Nadya but you don’t need to know any of the other books to enjoy this. Nadya was born without part of her arm but she never missed it. She was placed in a state run orphanage and adopted by an American couple. One of the things she loved in Russia was a tortoise and her new parents thought it was turtles due to a mistranslation and show her pond in the neighborhood of her new home. She grows to love watching the turtles and one day sees one that has “Be Sure” carved on its shell. When she goes to help this turtle, she falls into the door under the water of the pond and finds herself in a water world where people and giant turtles live together. A wonderful story but a bit bittersweet for Nadya at the end.
Digital review copy provided by the publisher through NetGalley