The Hundredth Man — Jack Kerley / J.A. Kerley

Bizarre messages found carved into the flesh of two corpses in Mobile, Alabama have launched a special unit devoted to solving psychotic crimes. They're also launching Detective Carson Ryder into a nightmare.

Ryder's secret investigative weapon is his own family's terrifying past - and the shadowy counsel of his own brother, a brutal and taunting killer who knows all too well how madmen think.

And as the body count grows, so does Ryder's inescapable fear that the killer is as intimate - and as close - as the next victim....