Book excerpt: The Iron City has stood for thousands of years, but now, dark forces move within her metal walls to bring down her royal family and subjugate her people. Princess Aldreia, heir to the throne, must join with the peasant Tunnel-Runner Mouse to battle against the threats against her city and protect her birthright! From the darkest cellars of the city Underworks to the skies around its tiers, the battle for the Iron City has begun!