A father travels to the future to team up with himself and change the past in this thrilling sci-fi sequel from the bestselling author of Sol Saga.

Andrew Frost doesn't have time to relax. Having defeated an enigmatic killer and made a massive sacrifice to protect his family, he now has an even bigger problem on his hands. It seems his daughter's mere existence could bring about the collapse of the universe. So, on the advice of Tim, his super-intelligent canine AI companion, Andrew decides to travel forward in time to get some help from someone who should know exactly what to do: himself.

After journeying through the wormhole, Andrew and Tim arrive in a strange world where the rich inhabit towering skyscrapers in vast metropolises while the poor live in squalor in crumbling ruins walled off from the wealthy. Future Andrew is (not unexpectedly) pissed to see his younger self—and he's mysteriously strong for his own advanced age.

Whether they want to or not, Andrew and Tim will have to work with their alternate selves to find out how to stop the destruction of the universe. But they'll also need to watch their backs. Because a deadly enemy has returned, poised to wipe out any Andrew from any timeline . . .