This is a lovely charming book, both a gripping historical adventure and a love letter to the city of Kraków. Some of the descriptions of the characters are a bit (ahem) 'of their time' but it's also really beautifully written and illustrated. Given that it was written in 1926, and what Poland has suffered since then, the final line - "May it bring in an epoch of peace to all men!" - is heartbreaking.