A sister book to the Sally Lockhart trilogy, when we finally find out what happened to Adelaide the little servant girl lost in London during the first boook of the trilogy. When Jim finally finds Adelaide is is under much different circumstances than he would ever have expected. He also meets Becky Winter, hired to teach Adelaide to read and writee and get ready to assume her duties as Princess of a small country in Central Europe. Everything seens to have worked out for Adelaide, but only days after a mysterious explosion in London, an assassination makes Adelaide ruler of Razkavia, she rises to the occasion and her new station, gleefully playing international politics with the help of Becky and Jim Taylor, a dashing young detective.
"The Tin Princess" features characters from the other books in this series (Sally Lockhart), but is only a slightly-connected story. It's the somewhat-familiar story of an English girl, Adelaide, of no breeding but innate intelligence and wit, who marries the exotic prince of a small European country. Seeking a job, the young Becky Winter is hired to be Adelaide's tutor, and soon finds herself helping Adelaide negotiate a maze of dangerous politics and social situations, and he unexpectedly becomes Queen...