"When Seraphin, Hans, and Sophie returned from their voyage to the moon, they didn't come home empty-handed--they brought with them aetherite, a miraculous substance that defies gravity! To keep their secret safe from the Prussians, the trio lives in hiding on a remote island in Brittany. Meanwhile, Seraphin's father has founded the International Society of Aether, a group of scientists dedicated to the peaceful pursuit of space exploration. But on...

On the aethership's maiden voyage, Seraphin and the Knights of Aether had prepared for everything?except treason. The villainous chamberlain wants to overthrow King Ludwig and claim the electro-aetheric technology for Prussia. The only escape for the king and his companions lies in the frosty skies above Bavaria. The ship?s first flight is a success, but their respite is short-lived. As long as the chamberlain is free to spread his lies, these travelers...