It's amazing how hard it can be for an unpublished book writer to break into the market, especially considering what's out there. Literary rejections on display is right on the money with its commentary about the current publishing climate. So many agents and editors turn down works that they like and think are useful, but that would not be commercially popular enough.
Oddly, I think that the non-fiction work I've been querying is very marketable. The subject matter is popular on the shelves, and at least one large publisher is actively looking for titles on the subject. Not only that, but I actually found an angle that has never been covered by any of the current books on the subject. I found an agent that recently sold a book to the very publisher I've been eying, and he did ask for a book proposal. But, since he never got back with me, I'm assuming he's passing.
It strikes me as strange that it can be so hard to break into the market when there are titles like this book that are selling. Oh yeah- I went there. That's what publishers are buying right now, apparently. And, it's doing very well. Who knew?