A Land Fit for Heros by Richard K. Morgan (Books 1-3 in the Series)
The 3-book set of trade paperback novels includes the below titles:
The Steel Remains (ISBN 9780345493040): A dark lord will rise. Such is the prophecy that dogs Ringil Eskiath—Gil, for short—a washed-up mercenary and onetime war hero whose cynicism is surpassed only by the speed of his sword. Gil is estranged from his aristocratic family, but when his mother enlists his help in freeing a cousin sold into slavery, Gil sets out to track her down. But it soon becomes apparent that more is at stake than the fate of one young woman. Grim sorceries are awakening in the land. Some speak in whispers of the return of the Aldrain, a race of widely feared, cruel yet beautiful demons. Now Gil and two old comrades are all that stand in the way of a prophecy whose fulfillment will drown an entire world in blood. But with heroes like these, the cure is likely to be worse than the disease.
The Cold Commands (ISBN 9780345493071): The otherworldly Kiriath once used their advanced technology to save the world from the dark magic of the Aldrain, only to depart as mysteriously as they arrived. Now one of the Kiriath’s uncanny machines has fallen from orbit, with a message that humanity once more faces a grave danger: the Ilwrack Changeling, a boy raised to manhood in the ghostly realm of the Gray Places. Wrapped in sorcerous slumber on an island that drifts between this world and the Gray Places, the Ilwrack Changeling is stirring. When he wakes, the Aldrain will rally to him and return in force. But with the Kiriath long gone, humankind’s fate now depends on warrior Ringil Eskiath and his few, trusted allies. Undertaking a perilous journey to strike first against the Ilwrack Changeling, each of them seeks to outrun a haunted past and find redemption in the future. But redemption won’t come cheap. Nor, for that matter, will survival.
The Dark Defiles (ISBN 9780345493101): Ringil Eskiath, a reluctant hero viewed as a corrupt degenerate by the very people who demand his help, has traveled far in search of the Illwrack Changeling, a deathless human sorcerer-warrior raised by the bloodthirsty Aldrain, former rulers of the world. Separated from his companions—Egar the Dragonbane and Archeth—Ringil risks his soul to master a deadly magic that alone can challenge the might of the Changeling. While Archeth and the Dragonbane embark on a trail of blood and tears that ends up exposing long-buried secrets, Ringil finds himself tested as never before, with his life and all existence hanging in the balance.