This well-crafted comedy is both hilarious and forgettable. It's not the sort of story that gives you a soul-deep connection with the characters, and the references are incredibly dated for younger readers (if you don't know what a floppy disk is, or why a computer would need one, or that they come in different sizes, you're probably too young to appreciate the humor), but I zipped through this book in a single afternoon and laughed my ass off.
Our hero, an engineering professor, has fallen accidentally-on-purpose into being a sf author. Attending his first con, he is naturally utterly bewildered by the natives.
Our heroine, the hero's girlfriend and a folklore professor, still feels the sting of her young adulthood journey into fandom and, as such, offers the somewhat pitying condescension of someone who's smug about having "escaped" from Plato's cave.
Our antagonist, a famous author whose books are beloved in the epic fantasy fandom, is the sort who detests his audience and behaves like an entitled ass -- so it's no wonder that he has only scathing things to say about fans and that someone eventually murders the poor bastard.
(That's not a spoiler, btw; the back of the book blurb will tell you the guy gets killed, though it doesn't happen for a good long while in this sff-mystery-ethnography of geek culture circa 1987.)
For modern readers, the thing to remember is that 1987 was a different country. It's not 2014. Geeks don't rule the Earth. The Internet is not keeping us continuously connected to people who love what we love. Cons -- even little regional cons like the one in this book -- are about the only way to stay connected outside fanzines, and cramming every last second with enough wild geekery to last months is your major objective for the weekend.
Some of the author's observations on the culture are painful skewerings of the worst aspects of fandom cranked to eleven, but plenty of them -- even the painful ones -- are right on the mark for the time period, and they fit the voices delivering them.
The humor is spot-on. The mystery is easily unraveled, but the reveal is fun to read anyhow (especially if you're a DM who likes to torment your players or a player who has been so tormented).
If you ever spent the weekend running around a hotel in costume, crashing on couches and floors, staying up until sunrise debating the merits of different editions of D&D or Heinlein's group marriages ... this book's for you.
In closing: The Dragonrider was robbed! Curse you, Appin Dungannon!