Darkness always precedes the dawn. Landon and Sarah's world is under attack. Can their faith survive the ultimate test? Returning to college, they're ready for a fresh start. But ancient evil has infiltrated the institutions, seeking to unravel their bond. Professors, fellow students-who can be trusted when every friendly face might hide a demonic foe? As secularism threatens to erode their beliefs, and direct diabolical assaults plague their every step, Landon and Sarah must fight to hold onto their faith and each other. Can they expose the darkness before it consumes everything they hold dear? With their spirits and their very souls on the line, Landon and Sarah's journey is fraught with spiritual warfare and insidious deceptions. Will they emerge victorious, or will the demonic forces drive an irreversible wedge between them? Lux in Tenebris is the fourth book in The Unfallen: a fast-paced, action-packed Christian suspense series. Fans of novels by Frank Peretti, like This Present Darkness, or fans of Alana Terry, Creston Mapes, Lynette Eason, or Collen Coble, will fall in love with Landon Walker. An on-the-edge-of-your-seat redemption story.