You go back to Martin the Warrior who goes on a quest to see where he grew up till age 6. He found a ship that was stuck on 2 rocks. And also found that some other creatures are living in it. Over the course of time they find out that the ship is only half the ship. The other half of the ship was sunk. It is a daunting book that will stay with you forever.
Bottom line: I recommend it. It does have fights but in the end everything is OK and you are sad to lose the characters. I’d say it’s for 3rd, 4th, 5th, 6th, and so on. People of all ages will like this book.