The SIGMA Key

By: Karlowsky, R. L.

Family. Land. Freedom. Worth fighting for.

Fourteen years after Directive 7, Lucas "Wolf" Mercer and Alexandra "Raven" Mercer have built the life they once thought impossible-a family, a thriving ranch, and a future far removed from the battles that shaped them. But when a manufactured biological outbreak spreads fear across the country, Sigma emerges from the shadows with a private army and a plan to seize the Sigma Key and a secret powerful enough to reshape the world.

This time, the war comes directly to the Mercer ranch. With their children in danger and the government beginning to fracture from within, Lucas, Alexandra, Grinder, Soo-Jin, and a hardened band of veterans turn their home into a fortress as old enemies return, new threats emerge, and every road leading to the ranch becomes a possible attack route.

For the Mercers, the stakes are no longer simply global. They are fighting for their children, their land, and their home-and anyone who comes for the family is about to discover why Wolf and Raven are still feared.

• Format: Paperback
• Language: English
• ISBN: B0HKNJ44WN
• ISBN13: 9798175528573
• Release Date: September 2026
• Publisher: Independently Published
• Length: 378 Pages
• Weight: 0.82 lbs.
• Dimensions: 0.8" x 5.0" x 8.0"