The Fall (The Seventh Tower, #1)

Tal has lived his whole life in darkness. He has never left his home, a mysterious castle of seven towers. He does not see the threat that will tear apart his family and his world.
But Tal cannot stay safe forever. When danger strikes, he must desperately climb the Red Tower to steal a Sunstone. He reaches the top...
...and then he falls into a strange and unknown world of warriors, ice ships, and hidden magic. There Tal makes an enemy who will save his life and holds the key to his future.