Congratulations! I always love to hear about it when ficcers break out into RL fiction writing. I don't know why you were so surprised! Liar's Chair reads like very classic science fiction from the early/mid-20th century. I love to see it when real classic sci-fi makes it into Stargate fandom. Stargate is really such a collection of indulgent crack by the writers that it's only classified as sci-fi because it takes place in space.

(Granted, in the first couple of seasons of SG-1 there were instances of real science fiction, I'm thinking that one episode early S1 where they find the planet of sentient crystals; but SGA has never had that sort of thing. It's a drama that takes place in another galaxy, with just that many more opportunities for a deus ex machina because of the setting)