The notes are always right. Yellow legal paper, block capitals, signed J.M. They're waiting at Detective Jake Mercer's crime scenes before he gets there.

Then a sergeant everybody loves walks out of his own precinct and doesn't come back. And the next note doesn't say where he is. It says: look at him.

Internal Affairs thinks Jake's being fed by a dirty source. The handwriting lab thinks something worse.

Case Two of the Jake Mercer thrillers. Reads on its own, hits harder after Case One.