The Guns of Avalon [first edition]

Across the worlds of Shadow, Corwin, heir to the throne of Amber, gathers his forces for an assault that will restore his birthright--the crown. But a growing darkness threatens Corwin's plans. It's an evil that stretches to the heart of the kingdom itself, where the demonic forces of chaos amass to annihilate Amber and all who would rule there. Book Two in the "Amber" series.