Is there anything you’ve written that is sitting in a drawer/file cabinet that will never see the light of day?
Not really, no. The very first novel I wrote was Agent to the Stars, which I sold shortly after Old Man’s War (the second novel I wrote) was published. All the other novels I’ve written since were either written under contract or claimed after I wrote them. Likewise, I only wrote a couple of short stories before OMW was published and I sold both of those, and since then I only write short stories that either have been commissioned or that I write for my own amusement and then post here. So there is literally (hah!) no backlog of material from me, and (thankfully) no stuff I’d be embarrassed to show off.
Now, the above applies only for work that I wrote as an adult. When I was a teenager I wrote several stories (not to mention poetry and song lyrics), and I have them here in the office with me. Most of these are, well, not good — I think they’re fine for the output of a teenager, but I’m definitely grading on a curve, there. I’m not ashamed of them, but neither do I imagine there’s much of a market for them (one of the stories, set in the future, features a semi-truck full of cassette tapes). Unless I decide to pay someone to type them into the computer, and then post them here purely for archaeological interest, I don’t imagine any of you will ever see them.
I’ll also note that there’s a fair amount of material I wrote professionally that isn’t readily available on the Internet — most of the work I did for newspapers, for example, which is only accessible via paid archives; a lot of the other print work, which is not available anywhere online; most of what I wrote for AOL back in the day, which also went away when the client-based AOL service did, and material posted here prior my first Movable Type installation in 2003, because I revamped the site and took a lot of that stuff offline.
None of that stuff will “never see the light of day” because in fact most of it was seen by a ton of people when it was first published. It just won’t be seen again. The good news there is that a fair amount of it isn’t worth seeing again, for reasons ranging from marginal competence on my part, to the material simply being woefully outdated. No one will miss it much, me included.
So: Yeah. I got nothin’ for you lurking in the shadows, I’m afraid. What you’ve seen from me is really and truly everything I have. Well, except for the upcoming novel Lock In, and the novella I finished up a couple of weeks ago. But those are both on their way. Honest.