I assumed first publication rights were part of copyrights; are they just not talked about that way?
IANAL, and IAN an agent, but based on my own contract: copyright remains mine, but my publisher has the right to distribute the book in English worldwide. This means if I print my own version of the book and distribute it, I'm violating the contract, because I told them they could have an exclusive on that.
"First publication" has been conflated a bit in this thread. There's the first time a particular piece has been published (and yes, putting it up on your web site counts), and there's the first time a particular author has been published (which isn't really a "right" so much as a marketing thing). Neither of them has anything to do with who holds the copyright.
I had been waiting until I had need-to-know before digging in to understand the whole publishing / copyright business, but since you got me started... Can anyone direct me to a simple list of the different rights you can sell (or rent?) on your work?
Others may have a list. But here's the section of my contract labeled "Reserved Rights retained by Author":
All rights in the Work other than the Rights including reserved dramatic adaptation rights (including motion picture, video, television, radio, live-stage, etc.), commercial tie-in and merchandising rights, comic book adaptation/graphic novel adaptation, multimedia adaptation, and foreign language translation, sequel and prequel (subject to the Option clause), the right to publish a screenplay and/or television script of the Work, and non-exclusive public reading.
Basically, the only rights I tied up with this contract were worldwide English print rights, and English audiobook. Everything else I'm free to sell to someone else, or exploit myself.
Fundamentally, rights and contracts are one reason it really,
really helps to have an agent if you're planning to deal with a publisher, even a small one. A lawyer can help you understand a contract, but unless they specialize in publishing, they're not going to be able to tell you if a contract is exploitative or not. Agents know the terminology, and they know the norms across the industry. It's also their job to protect you, and when you're dealing with a complicated contract (mine was 25 pages, single-spaced), having someone knowledgeable in your corner is invaluable.