Echoes of the Past (Demon Squad Book 4)

Absence makes the heart grow fonder? Not when you're the Devil's nephew.

An unexpected message gives Frank the answer he's sought for years--Where did God and Lucifer go?--but the knowledge brings its own dilemma as inter-dimensional war looms, threatening to engulf the Earth.

Tasked with the planet's defense, Frank scrounges for a plan and finds a piece of his past better left behind. If the aliens don't kill him, what he learns just might.