Betrayal at Devilsfall

Publisher's blurb:

“One more thing,” Rowan says. “When we treat with the orcs, we go in unarmed.” Roccar crosses his arms, grimly asking, “an’ exactly where will we be diggin’ our own graves?” Glendale points a gauntleted finger to the Spine of the World’s foothills on the map. “Here, a combe where Laraur and Many-Arrows repelled the Arcane Brotherhood’s designs--together. It has no name, but the Orcs call it… Devilsfall.”

North of Silverymoon, secret envoys attend a tense summit with the Orc Kingdom of Many Arrows. When an assassin fells an Orc Lord, the North slips to the brink of havoc.