Prince of the Titans - J.K. Jones

Ruthless. Unyielding. Deadly.
Alpha Adrianus Rex, the merciless ruler of Titan Vale, is feared by all who dare cross him. As an alpha with a heart as frigid as the icy tundra he calls home, Adrianus shows no mercy to those who oppose him. He's on a mission to hunt down every defected Karl sorcerer and make them pay with their lives, their heads impaled on spikes as a warning to all.
But there's one Omega he's saving for last: Kieran Greyford. The most dangerous of them all, with a darkness in his soul that seeks nothing but destruction.
Even though Kieran is his mate, Adrianus won't let sentimentality cloud his judgment. He'll stop at nothing to put an end to Kieran's malevolence, even if it means sacrificing his own soul.
As the final showdown looms, will Adrianus be able to defeat Kieran once and for all? Or will the Omega's twisted desires lead them both to their ultimate demise?

Warning: this is a MM historical fiction Viking romance, mm romance werewolf shifters, mm paranormal romance, mm first-time romance, mm dark romance, mm enemies to lovers, assassination attempts, and a HEA. This is book three in the Titan series, and although it can be read as a standalone it's best to read the first book.