After two years of fighting to survive...

The captain and crew of the great bronze airship, Kubla Khan, are on the brink of finding their way home, but the Miasmic Expanse is a treacherous and dangerous place, where even the smallest mistake can be fatal.

Now with their home almost in sight, disaster strikes in the form of a simple accident, an experiment gone wrong...

After almost being blinded by an experiment that backfires, Lieutenant Commander Hall is lucky to escape to a deserted world, where all that remains of the human population are the empty ruins of their cities and towns, and the monsters which killed them off.

One man against a world of starving creatures, but how long can the solitary Lensman hope to survive when his world is now filled with shadows.

A Shadow on the Sky is the third book in the 'Glass Darkly' diesel-punk series.