Gullstruck Island, (also known as The Lost Conspiracy) was written by Frances Hardinge and published on 1 June 2009.

The Lost are a kind of oracle that can send their minds out across Gullstruck Island in order to do many impossible tasks, such as finding criminals.

The Lace are a tribe on Gullstruck Island that have been mistrusted for several centuries after they committed murders against other settlers.

In recent years, the Lace have proclaimed that one of their own people, a girl named Arilou, is a Lost, and have managed to obtain some recognition and respect for themselves.

Hathin is forced to keep up the lie for her people's sake, especially since the test could well oust Arilou as an imposter and endanger the Lace's future.