As with the first book in this series, I was in the middle of two other books when I started this one and I ignored them until I’d finished this one. It was even better than the first. A young mapmaker’s apprentice has gone missing, and Glass and Steel are asked to find him. India’s hand warms when she touches one of the exquisite maps the apprentice drew, telling her it’s magical, and so is he. Meanwhile, Matt’s Aunt Letitia is trying to arrange a marriage between him and every eligible young woman with at least a little noble blood. Matt’s pals, Cyclops and Duke and his cousin, Willie, join in the fun through the main parts of London in Victorian times. This story involves another guild, this one for mapmakers, as well as the desire to keep their magical abilities secret due to the antipathy of non-magical people.