Anointed in secret. Hunted by his king. Betrayed by his own blood.

The sacred oil still glistens on David's brow when his world turns upside down. Without warning or desire, the shepherd musician finds himself marked by the prophet Samuel as Israel's next king—a dangerous honor that transforms him into a marked man.

At court, David's lyre may soothe King Saul's troubled mind, but his elder brother Eliab watches from the shadows with murderous intent. As the king's trusted scribe, Eliab whispers poison into Saul's ear, manipulating the increasingly unstable monarch into sending David on missions designed for certain death.

When Saul's madness erupts into open violence, David flees into the wilderness with a ragtag band of outcasts. Each dawn brings new threats as their numbers swell—hungry men with nothing to lose and everything to gain by following this charismatic leader-in-exile. But David's own judgment begins to falter as desperation drives him to the unthinkable: seeking refuge with Israel's sworn enemies in Gath.

In the Philistine stronghold, David faces his greatest test. How can he remain faithful to YHWH while serving a foreign king? Will his men remain loyal when ordered to raise swords against their own countrymen? And in the royal courts of Israel, Eliab's scheming continues unabated, spinning a web of treachery that threatens to ensnare David from afar.

Lunacy draws readers into the perilous years between David's anointing and his throne—where a shepherd must become a warrior, a musician must become a leader, and a faithful servant must learn to outmaneuver a king descending into madness.

Return to ancient Israel in this riveting sequel to Legacy from the award-winning, bestselling author who brings biblical history to vivid, pulse-pounding life.