Propeller Opera (author of "Princess and the Pilot)
Not too much to say on this one since I don't need to know too much beyond the art and the pedigree
of the creator to want it.
If you are curious about this author or the type of work this may be, most of their pilot trilogy have been adapted to anime: "A Pilot's Love Song" and "Princess and the Pilot". They're basically romance stories set in times of war in fantastical settings, but with older flying tech (think WW2 fighter pilots or maybe even less advanced).
This novel sounds like it is going to be an ongoing war series. The reviews have people saying they are looking forward to the next volume, so it's not done yet. Just released volume 1 this week, September 2019. One to keep an eye on.
Synopsis (Garbled Google Translate):
Label / Publisher: Gagaga Bunko / Shogakukan