The Rogue Knight (Five Kingdoms, #2)

Cole Randolph, searching for friends kidnapped on Halloween, is trapped in the kingdom of Elloweer, a world between wakefulness and dreaming. With new friends Mira, Twitch, and Jace, Cole joins the resistance to find Mira’s sister Honor.

A mysterious foe massacres towns, leaving no survivors. And a rebel "Rogue Knight” upsets the balance of power. Pursued by enemies, Cole and Mira use a new kind of magic for protection and to outwit the High King, ruthlessly seeking to regain what he has lost.