It is the summer of 1892, one year since Sophia Tims and her friend Theo embarked upon the dangerous adventure that rewrote the map of the world. Since their return home to Boston, she has continued searching for clues to her parents’ disappearance, combing archives and libraries, grasping at even the most slender leads. Theo has apprenticed himself to an explorer in order to follow those leads across the country—but one after another proves to be a dead end.

Then Sophia discovers that a crucial piece of the puzzle exists in a foreign Age. At the same time, Theo discovers that his old life outside the law threatens to destroy the new one he has built with Sophia and her uncle Shadrack. What he and Sophia do not know is that their separate discoveries are intertwined, and that one remarkable person is part of both.

There is a city that holds all of the answers—but it cannot be found on any map. Surrounded by plague, it can only be reached by a journey through darkness and chaos, which is at the same time the plague’s cure: The Golden Specific.

She has only seen the world through maps. She had no idea they were so dangerous.

Boston, 1891. Sophia Tims comes from a family of explorers and cartologers who, for generations, have been traveling and mapping the New World—a world changed by the Great Disruption of 1799, when all the continents were flung into different time periods.  Eight years ago, her parents left her with her uncle Shadrack, the foremost cartologer in Boston, and went on an urgent mission. They never returned. Life with her brilliant, absent-minded, adored uncle has taught Sophia to take care of herself.

Then Shadrack is kidnapped. And Sophia, who has rarely been outside of Boston, is the only one who can search for him. Together with Theo, a refugee from the West, she travels over rough terrain and uncharted ocean, encounters pirates and traders, and relies on a combination of Shadrack’s maps, common sense, and her own slantwise powers of observation. But even as Sophia and Theo try to save Shadrack’s life, they are in danger of losing their own.

The Glass Sentence plunges readers into a time and place they will not want to leave, and introduces them to a heroine and hero they will take to their hearts. It is a remarkable debut.