Emilie

While running away from home for reasons that are eminently defensible, Emilie's plans to stow away on the steamship Merry Bell and reach her cousin in the big city go awry, landing her on the wrong ship and at the beginning of a fantastic adventure. Taken under the protection of Lady Marlende, Emilie learns that the crew hopes to use the aether currents and an experimental engine, and with the assistance of Lord Engal, journey to the interior of the planet in search of Marlende's missing father. With the ship damaged on arrival, they attempt to traverse the strange lands on their quest. But when evidence points to sabotage and they encounter the treacherous Lord Ivers, along with the strange race of the sea-lands, Emilie has to make some challenging decisions and take daring action if they are ever to reach the surface world again.

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 realize 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. Emilie joins the expedition and finds herself deep in personal entanglements, with an angry uncle, an interfering brother, and an estranged mother to worry about — not to mention a lost family of explorers, the strange landscapes of the upper air, and the deadly menace that inhabits the sky world.