Finally! A Release Date for 'The Aeronaut’s Windlass' Announced!

It's finally coming!
The first book in Jim Butcher's new high fantasy steampunk series, The Cinder Spires is coming on September 29th of this year, and it's called 'The Aeronaut’s Windlass' from Roc Books, which also publishes his Dresden novels.
Anne Sowards of Roc describes it as follows:
 “Horatio Hornblower meets The League of Extraordinary Gentlemen—it’s a fantastic, creative new series of airships, privateers, warrior monks, and mad sorcerers. Honestly, it’s like Jim put all my favorite things in one book!”
Jim's website (which you can find here) includes the following description:
"The Cinder Spires is set in a fascinating new world, where an ancient evil has awoken, plunging the world into a shroud of mists filled with monstrous and fantastic creatures. The fate of humanity will rest on the loyalty and courage of a single airship’s crew. New York Times bestselling author David Weber said, “This is Jim Butcher at his best…It’s steampunk meets magic with a dose of sci-fi for seasoning.”'
This comes just days after Jim provided us with a sneak peak at the first line of 'Peace Talks' in a much buzzed about tweet:

It's a great week to be a Jim Butcher fan!
Now, does anyone know where this image came floating around the interwebs from? Fanart?

Edit: Through the excellent work of my friend Kim, it looks like Windjager is the German edition of 'The Aeronaut's Windlass' and the Google translate of the description is:

"Since the fog has covered the whole world, people live in fortress-like towns on the tops of mountains. Entering the mist can be fatal. Nevertheless, as the troops summit fortress Aurora in the area of Albion, and a war can not be averted. The summit Prince of Albion calls his allies and prepares his people for battle. The fleet is strong, the men and women are well educated. But his greatest hope is the summit prince on the secret mission of Captain Grimm and his airship hunters."

Sounds like fun! I kind of hope that they use the same cover for the US edition as well, though there's no guarantee.