This book has an amazing pages design, it mix a 2d minimalistic style with a more 3d computer design illustrations. So for the visual aspect of it, it's a really original book. The story in itself is simple enough two friends going on an adventure in the sea. There are a fews informations about wildlife and the importance of keeping the water clean (ecological message), which is a good thing. Fun, interesting, educational and visually original. 5 stars!