Azrael (The Undernet, #2)

Milt Edwards, survivor of an incident that almost took his life six months previously, is back. He and his girlfriend, Roberta (Robbie) Jones, both suffer from PTSD as a result of their ordeal, and they attend counseling sessions in order to help them work through their mental anguish.

Nothing helps, but then a friend of Milt's is killed, ostensibly by the same person who designed the Undernet—Azrael. Galvanized into action, Milt once again joins forces with the FBI in order to find out who ...