When her grandmaster father is imprisoned in the dungeons of St Petersburg, Sophie plans to help him escape through an incredible chess-playing automaton called the Clockwork Queen . But will she be able to outwit the Empress herself? A page-turning historical adventure from Cogheart author Peter Bunzl . Publisher: Barrington Stoke Ltd Author(s): Peter Bunzl Illustration(s): 14 Illustrations, black and white Number of pages: 128 Publication date: 2022 Dimensions: 130 x 198 x 13 Cover type: Paperback / softback Illustrator: Lia Visirin