The Laws of Magic Series by Michael Pryor

Aubrey has a difficult choice to make to save his friends when Albion erupts into war—and it could cost him his life   The war that has been looming for so long finally erupts, sending Albion and the continent into chaos. Aubrey, George, and Caroline are brought into a top-secret espionage unit and sent on a mission to investigate a mysterious magical facility on the Gallia–Holmland border... moreAubrey has a difficult choice to make to save his friends when Albion erupts into war—and it could cost him his life   The war that has been looming for so long finally erupts, sending Albion and the continent into chaos. Aubrey, George, and Caroline are brought into a top-secret espionage unit and sent on a mission to investigate a mysterious magical facility on the Gallia–Holmland border. There they uncover a factory that is about to unleash an unstoppable horror that could win the war within weeks. The only way to save hundreds of thousands of lives could cost Aubrey his friends, his family, his reputation—and even his life. less

In the earth-shattering final book of the Laws of Magic series, Aubrey goes deep into the lair of his enemy in an attempt to save the world Aubrey Fitzwilliam, renegade and traitor. Instead of clearing his name in Albion, Aubrey has chosen to pursue his enemy, Dr. Mordecai Tremaine, deep into the heart of enemy territory. What he uncovers in Dr. Tremaine's stronghold promises to change the course of the war and the future of humanity itself... moreIn the earth-shattering final book of the Laws of Magic series, Aubrey goes deep into the lair of his enemy in an attempt to save the world Aubrey Fitzwilliam, renegade and traitor. Instead of clearing his name in Albion, Aubrey has chosen to pursue his enemy, Dr. Mordecai Tremaine, deep into the heart of enemy territory. What he uncovers in Dr. Tremaine's stronghold promises to change the course of the war and the future of humanity itself. A hideous combination of electrical science, golem manufacturing, and soul-shattering magic is bringing the world far closer to the edge of the abyss than anyone apart from Aubrey realizes. Alone, reviled, and hunted, this is Aubrey's last chance to save the world—for if he doesn't there might not be a world left to save. less