You can't keep your family safe forever.

It's been five years since Mason returned to work as a private investigator, and he's just found the balance between his job and family life. Unfortunately for him, there's a new killer in San Francisco who will stop at nothing to disturb the peace.

The Friday Killer has been targeting students, and Mason's daughter – Amy – is next on the list. Without the help of his friends on the force, it's up to Mason to find this killer before it gets personal. Before his own daughter becomes another name in the obituary.

Mason Black comes back with a bang as he dives head-first into a new investigation. With nail-biting action and delicious intrigue set to rapid-fire, you'll still be turning the pages of this exciting new thriller hours past your bedtime.