Timepiece (Hourglass #2)

A threat from the past could destroy the future. And the clock is ticking...
Kaleb Ballard was never supposed to be able to see ripples - cracks in time. Are his powers expanding, or is something very wrong? Before he can find out, Jonathan landers, the man who tried to murder is father, reappears. Why is he back, and what, or whom, does he want?
In the wake of Landers' return, the Hourglass organization is given an ultimatum. Either they find Jack and the research he's stolen on the people who might carry the time gene, or time will be altered - with devastating results for the people Kaleb loves most. 
Now Kaleb, Emerson, Michael, and the other Hourglass recruits have no choice but to use their unusual powers to find Landers. But where do they even start? And when? And even if they succeed, it may not be enough...