Agent Boo manga chapter book volume 3: The Heart of Iron (Agent Boo manga #3) (Paperback)
Agent Kira has been kidnapped! Agents Boo and Asano must journey behind enemy lines into the heart of Queen Misery's empire -- Iron City -- a wonderland of technical marvels that holds many secrets. With the clock ticking, Boo must make a difficult choice: should she follow her orders or her heart?