Intertwingled series

Everything is deeply intertwingled - Ted Nelson

Yes, but he was talking about hypertext and computers! I wasn't prepared for intertwingularity in my writing life!

Back in January, when I stopped writing to wrestle with the alligators that occasionally crop up in Real Life, my writing plans were straightforward. The sixth and final book in the Applied Topology series was ready to go, and in fact I did manage to hold off the swamp denizens long enough release A Revolution of Rubies last month. Subsequently I had written a stand-alone Regency fantasy, Salt Magic, and had started a new series that I thought of as a spin-off from the Applied Topology books. It was set in Austin and had a new set of characters and a new take on magic. Thalia from Applied Topology made a couple of cameo appearances, but the books could be read completely independently. I'd written The Language of the Dragon and A Trail of Dragon Scales and was halfway through Like a Dragon when I had to put everything on hold for a while.

Fast-forward to last week, when I resumed working, and... well, I should never have named the lead character in the Applied Topology series for Thalia, the Greek muse of comedy. She has enjoyed messing with my mind from Day One. And so while my attention was all on putting out fires, she used the unwatched back of my head to develop a seventh Applied Topology book. What's more, internal considerations dictate that this book happens after the first two Dragon Speech books but before the third.

Does't necessarily mean that they have to be written or published in this order, of course. Lois McMaster Bujold hops back and forth a lot in her Vorkosigan universe. But it's easier on me if I write the books in chronological order; that way I don't run into the problem of characters in Book N+1 not being aware of events that scarred them for life in Book N. And it's probably easier on readers if the books are published in chronological order.

So here I am with two different series operating in the same fictional world. How do I signal to readers that these books actually share not only a world but some characters and events, and that if they want to follow a strict chronology they should read Applied Topology 1-6, Dragon Speech 1-2, Applied Topology 7 and then Dragon Speech 3? Do I even need to do that? The first two Dragon Speech novels can be read without knowing anything about the Applied Topology events, although readers of the first series may get a few chuckles at how Thalia is perceived by someone outside her little circle of topologists. If I'm careful about writing the 7th Applied Topology book, it should neither depend on events in the Dragon Speech books nor give away the major elements of those books. Similar care will be required when I get back to Like a Dragon.

I guess I've muddled around to the point of answering my own question! Separate series, separate numberings, and do some fancy dancing around the intertwingularities.

Still, I'd like some way of letting potential readers know that these series operate in the same world and even overlap to some extent. After a suggestion from Mad Genius Club, I'm wondering if there's some way to tag all the books with something like "A Keep Austin Weird Book". Or would that be too much information? And would it be meaningless to people from the rest of the known universe? I'm used to seeing "Keep Austin Weird" bumper stickers every time I go out, but would someone from Michigan get the reference?