Tower of God

Bam has spent his whole life in a dark cave, with Rachel as the only person he has ever known. Rachel dreams of the stars and of what lies beyond, and when she leaves to climb the Tower, a mysterious structure where anyone who reaches the top is said to have any wish granted, Bam is left behind. Unable to accept being alone, he follows her inside, determined to catch up. Each floor of the Tower brings new rules and tests, and Bam, an unusual outsider with no training, has to rely on his wits, new friends such as the clever Khun and the spear-wielding Rak, and strange new powers he barely understands. Some of those tests are deadly, and the people he meets are never quite what they seem, so every step upward comes with a risk of betrayal. It's a sprawling, mystery-filled fantasy about ambition, loyalty, and the lengths people will go to reach their goals.