Explosion by Holly S. Roberts

While Moon’s organization puts the explosive puzzle pieces together to stop a madman, Cori and Duke take a wild ride to his cabin in the woods to hide from the killer.

Duke doesn’t speak, ever, but that isn’t important. Cori is his, she just doesn’t know it yet. Duke will do anything to keep her safe even at the cost
of his own life. Kidnapped and tortured, Cori has been through hell. Duke is the only person she trusts. With her escort past she has one thing to trade so he will keep her safe. The problem: Duke isn’t buying. Two mangled lives explode with a killer on the lose and hearts on fire.

This is the Hotter Than Hell conclusion to the series.