Kill switch

"When high school teacher Chris Franzia comes home on the last day of school, he finds two FBI agents waiting for him. A string of seemingly unrelated murders has left them baffled, and they can find only one commonality. All five victims shared a college class with Chris thirty years earlier ... and now he may be next. Struggling with the sheer impossibility of the situation, Chris's skepticism fades after a series of failed attempts on his life makes things deadly clear. Thus begins a harrowing cross-country race, forcing Chris to put together the pieces of his past while staying one step ahead of his mysterious assailants. Can he make the connection in time? And will the deadly picture of reconstructed memory be worth the price of knowing?"--