Goodreads Reviewers' Group discussion

Hello everyone,

I'm publishing a sci-fi novel next year that will be pretty ripe for the convention circuit. The only thing that's stopping me from getting a table at the next local one is the fact that I'll only have one book to sell. Sure, I could split a table with another sci-fi author (I know a few), but is it wise at all to do these kinds of things with only one published book? Should I wait until I have more of a catalog to offer? If it is a good idea to still do a con, what do you guys suggest for additional materials to fill up the table?

Thanks!