Humanity's been reduced to an underground existence. Aboveground is a scorched, UV-irradiated wasteland - but underground is sterile, regimented and hermetically sealed. The great hope of the future rests on the slim shoulders of genetically created, super genius children, but unfortunately they're dying young. For K/C-4(SCI) - Casey, for short - the answer lies in the past - but he's going to have to convince the powers that be that his risky time travel experiment will succeed in the time he has left: eight months and fourteen days.

But the past is hiding more secrets than Casey dreamed. Can he uncover them in time to save not only his colony, but himself?

Time travel books aren't my thing, but after a page or two I was hooked. ( )