I presume they're talking about this book trilogy. It's an alt-history World War I story where the two sides of the war are split between the Germanic "Flankers", who use steampunk mechs and machines, and the British "Darwinists", who instead use genetically modified creatures.
A new book series or just a new book. I know when I was young I loved being able to go to barnes and nobles or a book store and pick out my own book.
https://www.amazon.com/dp/1416971742/ref=cm_sw_r_cp_apa_i_CC2-FbW62D6NG
Description: It is the cusp of World War I. The Austro-Hungarians and Germans have their Clankers, steam-driven iron machines loaded with guns and ammunition. The British Darwinists employ genetically fabricated animals as their weaponry. Their Leviathan is a whale airship, and the most masterful beast in the British fleet.
Aleksandar Ferdinand, a Clanker, and Deryn Sharp, a Darwinist, are on opposite sides of the war. But their paths cross in the most unexpected way, taking them both aboard the Leviathan on a fantastical, around-the-world adventure….One that will change both their lives forever.
Maybe Leviathan by Scott Westerfeld? The airships were alive in this one, but sounds like a similar vibe at least. Don’t remember anything about floating crust, but there were definitely 2 main characters, and someone was British
Maybe Leviathan, by Scott Westerfield would be a good one? It's a YA steampunk set in an alternative WWI scenario. Very cool illustrations, too. The only problem is, it's part of a series and only the first book has come out.
Hope you get well soon.
I don't remember the main character having a mechanical dog companion, but I know there were some in the first book, and he was in the military, so maybe it came up later in the trilogy? (I've only read the first)
https://smile.amazon.com/Leviathan-Trilogy-Scott-Westerfeld/dp/1416971742
Yep thats the one. http://www.amazon.com/Leviathan-The-Trilogy-Scott-Westerfeld/dp/1416971742
Or like leviathan in space