I know how you feel. Go to a sci-fi section, and half the space taken up by bad fantasy books, da vinci code style junk and star wars expanded universe crap. Usually without classics like Clarke (There should be a law saying you have to have at least 2 copies of each of the Space Odyessy series and one The Collected Stories of Arthur C. Clarke), Asimov, Heinlein (I don't understand how you can have a sci-fi section without at least Starship Troopers), Pohl etc.
Well, in Polish bookstores one can find Starship Troopers, Stranger in a Strange Land, Fahrenheit 451, and some other classics lately.
Still, I suspect that, there isn't much market for reprinted classics, as they tend to disappear after some time.
Half of the libraries in my city have a few Heinlein's books, up to 15 Philip K. Dick's, most of Asimov's books, etc.
So, basically, there's no need to buy them and I suspect that very few people buy them.
On the other hand, only specialised Sci-fi libraries will have the poor books from series based on gaming universes, because for normal libraries it would be a waste of money, so there are a lot of poor fantasy/pulp sci-fi novels in stores.
Surely book stores are the same as any other stores? Shelf space costs money and therefore they have to put on the shelves stock what will move.
We already know we are a small, niche market when it comes to gaming. It strikes me as more than a little odd to think that might be different in the book world.
The books book stores show are the ones they think people will be most interested in. They are a business - they have to sell their stock. On the other hand, unlike gaming stores...you ask them to get you a book and they are more than willing.
Oh, I forgot to mention one thing. I was talking mainly about books about military units.
When it comes to battles...
There are tons of books about battles, campaigns and operations - on strategic and operational level.
If there's a book about a military unit, it will probably be about SS, Wehrmacht or Commandos.
There are almost no books on tactical level and about units other than SS/Wehrmacht/Commandos/.
People shouldn't ask themselves why schools get shoot up.
They should ask themselves why people who finish schools burned out due to mobbing aren't receiving high enough compensations to not seek vengeance.