Publisher's Synopsis
When Emilie and Daniel arrive in Silk Harbor, Professor Abindon, an old colleague of the Marlendes, warns them that she's observed something strange and potentially deadly in the sky, a disruption in an upper air aether current. But as the Marlendes investigate further, they realise it's a ship from another aetheric plane. It may be just a friendly explorer, or something far more sinister, but they will have to take an airship into the dangerous air currents to find out.
