For centuries, Phil Stark has been the keeper of the machine that changed the world. Guilt-ridden, impossibly alone, and losing his mind, the machine is his penance for what he'd done. When Phil meets Isla, he finds a kinship that he didn't think was possible. And when he crosses paths with Sammi and Declan, he believes that his life, and the fate of the world, might change forever. Reveal is the final book in the Caustic Series. In this installment, Declan and Sammi find his father, Richard with Ms. Gilly, and together they team up with an unlikely partner in one final attempt to rescue the sunlight and bring it back to their world.