Nadia, The Secret of Blue Water - The Secret Cave (Vol. 8)
In this volume, Nadia, Jean, and the rest of the Nautilus have gathered together on a beautiful, yet mysterious island in the South Pacific. However, this tropical paradise turns out to be anything but -- while the children try to find a way off the island, the adults are busy bickering amongst themselves.  And when Nadia and Jean venture deep into the heart of the island, their entire world is turned upside down.  Now, it's a race against time to get off the island before disaster strikes and destiny claims an innocent life.  What will Nadia learn of her past, and what effect will it have on her friends and shipmates?  It's a thrilling adventure for the whole family as Nadia continues!