Ludwig & friends live in a world of books. One day, a postcard arrives; Ludwig`s friend, Peter the penguin, has a broken submarine & needs Ludwig`s help
- under the sea. How can a dog who lives in a book explore the underwater world? Maybe with a bit of fairy tale magic & some help from his friends. This is the second 3D picture book from the author of Ludwig the Space Dog. Get ready for an adventure in another dimension.