Strung III: The Last Drop - Per Jacobsen

In this third—and final—book in the STRUNG series, Randall Morgan and David Pearson face their biggest challenge yet.

In the form of a half-empty IV bag once connected to Randall's son, they have found a means that might be used to fight the evil that has infected the world.

The question remains, though, whether they can bring themselves to use it. Because during the massacre at Redwater, their enemy finally revealed his true face … and it looks so damn innocent.