Earthdivers (Earthdivers #4)

After his mesmerizing prediction comes to pass, Tad is embraced as a holy messenger and invited into Christopher Columbus' inner circle to help guide the expedition to the "New World." There should be no better time to strike than in such close quarters with the enemy, but Tad struggles to act as he discovers the common ground between them.In 2112, the fate of the future hangs in the balance. Sosh and Yellow Kid's plan is interrupted by a hauntingly familiar face, and Emily threatens to weaponize the time-travel cave when her post comes under attack by a roving crew out for blood.