I actually had problems finding stuff that qualifies as stand-alone. So much is serialized these days... TOS: none that comes to mind, this is by far my smallest shelf. And it's dusty. TNG: Dominion War duology by John Vornholt (standalone story, if split over 2 books) DS9: A Stitch in Time by Andrew Robinson VGR: Pathways by Jeri Taylor ENT: A Choice of Futures by Christopher L. Bennett * (I guess this qualifies as standalone until the next one is due) ... and of the novelverse series: NFR: Once Burned by Peter David KE: Diplomatic Implausibility, by KRAD and if any part of Titan can be qualified as standalone: Orion's Hounds, by Christopher again. I'm reasonably sure SCE and Vanguard don't really qualify for the list, or if TLE does, so I'm leaving it at this.