Big time : a novel / Ben H. Winters.

What if time could be taken from us--the minutes, the hours, the years of our lives, extracted like organs taken for transplant? What would it mean for the world? And what would it do to the person from whom it's taken? Grace Berney is a mid-level bureaucrat in the Food and Drug Administration, a woman who once brimmed with purpose but somehow turned into a middle-aged single mom with a dull government job and a melancholy sense that life has passed her by. Until the night a strange photo comes across her desk, of a young woman in a hospital bed who has been subjected to a mysterious procedure. Against orders and against common sense, Grace sets out to bring the girl to safety, and finds herself risking her job, her future, and her life on whether she can find the missing girl before an obsessive and violent mercenary who's also looking. Big Time is a fast-paced thriller and a metaphysical mystery about the very nature of our lives.