The Heretic by Joseph Nassise

Book one of the internationally bestselling urban fantasy series by the author of "Eyes To See" and "By The Blood Of Heroes". Over 100,000 copies sold!

Former SWAT officer Cade Williams is no ordinary man. A chance encounter with a powerful supernatural entity left him possessed of certain unique abilities, such as the power to cross between the lands of the living and the dead. Now he commands the Echo Team, a special ops squad of modern Templar knights, and the things they hunt are far darker and much deadlier than the criminals that he used to face.

Echo's latest mission has the squad facing off against the Council of Nine, a group of necromancers determined to seize the Spear of Destiny: a legendary relic whose powers they hope to twist to their own ungodly ends. Cade and his men cannot allow this to happen, no matter the cost, for the results would be too horrendous to imagine.

But the necromancers are allied with the same demon that left Cade for dead five years before, a creature so powerful that the Templars know it simply as the Adversary. In order to keep the Spear from falling into enemy hands, Cade is forced to face not only the personal demons deep in his heart, but the very creature who put them there in the first place.