The sky is falling, and only one dilettante scientist can save the world, in the startling finale of the Shadowlands duology Rhia Harlyn risks death for science. Accused of heresy for promoting an unorthodox cosmology, she must defend herself, her work and her House alone. If only she could rely on her feckless brother Etyan, transformed through the combination of an occult scientist's experiments and the harsh rays of the skyland sun...