I don't get this. What are these publishers thinking?
WW2 Aviation is a niche market. Except for a few exceptions, these books do not reach the masses and sales remain generally in the hundreds. You would think that because this is such a small and demanding market, publishers think twice, three times before publishing (and many publishers do!

) and make sure their publication is the best they can possible put out.
By putting out these kind of books, they shoot themselves in the foot, because the 'mouth to mouth/word to mouth(?)' is very quick in this small world.
And when I hear what possible gems are waiting to be published or probably never will be, I wonder if I should change careers and become a publisher...
