I appreciate the thoughtful answers being posted here by experienced, published writers. Please don't misunderstand me. I'm not in anyway trying to choose my genre in terms of what sells better. I am well into a historical drama set in ancient Sparta and I chose that setting/era for several reasons, none of which have anything to do with any perceived marketability. I have no plans or desire to change my book. (really,
dantem42, that's not it at all)HOWEVER, I have heard "rumors" that historical fiction is not selling well these days. And it is my opinion that if I wrote a contemporary drama set in a place that I know, I would be able to finish the story much more quickly, as the research required for ancient Sparta is significant for me, being no historian. And my husband made an off the cuff remark to me last night that I could stay at home and write full time if I could make 15 - 20K per year writing. LOL! I have no idea what that means in terms of ANYTHING! How difficult is that to do in my chosen genre? Where does one even start to find indications of that? Since writers are paid by royalties, I started with sales numbers.
I am absolutely brand new to the business side of writing. I haven't even finished this novel to begin the querying process. And some of these questions have started floating around in my head. If I am fortunate enough in the future to be able to make choices regarding agents or publishing houses, then wouldn't an agent or a publishing house with a stellar selling record, compared to an agent or a publisher with low numbers for historical fiction, possibly be the better choice or at least one important factor in making my choice? I love writing, and I will continue to write whether or not I eventually get paid for it, but I also do not want to enter the business side of any sort of venture completely ignorant.
As
CheshireCat said, knowledge is power. At least it certainly can't hurt.
Overall genre sales numbers simply have no meaning for individual writers. Your historical novel may sell five million copies, and you best friend's historical novel may sell five hundred.
Yes,
Jamesaritchie, I know what you mean. So many factors come into play for a novel's success. But when deciding how much time/effort/sacrifice to make for this craft,
some sort of idea of averages, medians, trends, should give at least an indicator of possible chances for "success" as defined by any one's individual needs, shouldn't it? Perhaps not.
Sales only have a loose connection with bestsellerdom, and both have only a loose connection with income. Sure, there's a relationship, but not as tight as one might expect.
Fascinating point,
David I. I already feel I'm getting a better handle on this nebulous concept of book sales from the answers given here. That's why I posted the question. Thank you. And no, I agree it has nothing to do with writing, but I still think it has something to do with planning one's days, commitments, and future.
ORION - I hear you loud and clear, really I do. But I'm in that catch 22 where I might be in the position to get plenty more of those e-mails from readers
if I had more time to write, which I would have if I could stay home and write! I wouldn't have even asked this question if I were a stay at home mom and could write while the kids were in school. Between my job, my five year old and my nine year old (and I guess I should throw in my dear husband

), writing time is precious and my novel is slow-going.
I don't mean to sound cynical, especially when I've found a craft that gives me as much unbridled joy as this one does. I'm just trying to gather some information.
Thank you all for your time and well-thought out answers. I do appreciate each and every one of them.
c.e.