Rook: Exodus (Rook: Exodus #8)

The critically-acclaimed hit sci-fi series continues! The mission to save Bloodhound leads Rook, Dire Wolf, and Matterhorn into the deepest tunnels of Exodus... where Arachnid awaits. Thousands of mutated spiders swarm from the shadows, threatening to end mission to save the planet. And when the mysterious Warden known as Stag makes his move, another Warden may not make it out alive.