Deep in uncharted Peru, the holy town of Bedlam stands at the edge of a forest. Nothing here is as it seems. The shrine statues can move, and anyone who crosses the border dies. But somewhere inside are Cinchona trees, whose bark yields quinine: the only known treatment for malaria - a substance more valuable than the British Empire could ever have imagined. The astonishing new novel by the bestselling author of "The Watchmaker of Filigree Street".