The Queen Must Die

This is the story of Katie Berger-Jones-Burg.
One minute, she's under the bed of her New York apartment... the next she's in Buckingham Palace, at the height of Queen Victoria's reign... A dangerous place to be.
The Royal Family is in mortal peril. In the secret passages of the palace, a plot is afoot. Suspicious figures huddle in the gas-lit streets of London. And Katie is not the only time-traveller in the city...