The Devil's Grasp - Brian Koscienski - Bog

A thousand years ago, a mad wizard ensorcelled five gemstones, giving them the power to call forth and control the demons that haunt Hell itself. After a blood-filled battle with the mercenaries who helped him in his bid for this power, the wizard was defeated and the stones were spread across the continent, hidden from all but legend and bard's tale. Now, the kingdom of Tsinel threatens the tenuous peace with Albathia. King Theomann, ruler of Albathia, sets his oldest son upon a quest with his Elite Troop of warriors to find the stones. As they soon discover they're not the only ones searching for the stones. Unbeknownst to everyone, King Theomann's youngest son, Daedalus, has designs for power, aligning himself with the blood-thirsty leader of The Horde, a band of vile fiends razing town after town in the kingdom.
A band of ne'er-do-well thieves. A pack of insidious trolls. A group of wizards with dubious intent. All searching for the stones for their own purpose, none prepared for the power that the stones possess.
The power to control Hell will be held by one hand. Whose will it be?