Demon Blade Series by Mark A. Garland, Charles G. McGraw

The only hope of saving the princess Madia from Tyrr, the Dark Mage, and his demon forces is for Frost and his team of Subartan Guards to find the Demon Blade and persuade the swamp things that now possess it to let it go.

THE "LEAST" OF FOUR EVILSFrost, one of the world's great sorcerors, now possesses the Demon Blade, perhaps the most powerful (and dangerous) weapon ever created -- but he doesn't "want" it. Trouble is, plenty of others do, so he must not let it go until he finds the Blade's rightful guardian. But to do that he must return home. And "that" means facing those who betrayed him in his youth, as well as those whom he betrayed. It means facing who and what he was, and what he has become... moreTHE "LEAST" OF FOUR EVILSFrost, one of the world's great sorcerors, now possesses the Demon Blade, perhaps the most powerful (and dangerous) weapon ever created -- but he doesn't "want" it. Trouble is, plenty of others do, so he must not let it go until he finds the Blade's rightful guardian. But to do that he must return home. And "that" means facing those who betrayed him in his youth, as well as those whom he betrayed. It means facing who and what he was, and what he has become.He will arrive to find a land on the brink of war, his greatest enemy on the throne, himself the target of plots by lords and mages alike, and soon enough, family he didn't even know he had held ransom for the Demon Blade. Now he must choose among the least of four evils, and new, unimagined consequences he is only beginning to comprehend... less