Through the Breach

The elven druid Morael has discovered a breach in the fabric of space - a portal between his world and another. The danger of this breach is two-fold - if left alone, it could tear both worlds apart; but if discovered by the Council of Wizards, certain of its members could use the portal to start the Demon Wars anew.
The druid and an ancient mage decide that the safest course of action is to close it themselves - as long as they can connive a group of mercenaries into helping ...
The first novel by Scott Charles Adams, Through the Breach is an epic fantasy, grounded by the sorts of characters not generally found in fantasy.