Sand Castle by R. A. Montgomery takes YOU on an under-the-sea themed adventure as your magical sand castle comes to life at night Your 6-8 year old reader will explore a sunken ship and a haunted cove, meet some talking fish friends and foes, and be the hero of the story Choose Your Own Adventure Sand Castle is an interactive adventure book in which YOU decide what happens next. Just as you're falling asleep, you hear noises coming from the beach. Do you brave the storm and see what strange things might be happening, or will you wait for the morning, when it's safe? If you explore the enchanted castle, will you find someone trapped inside?