I'm not exactly thrilled with the image of Unspoken Truth - it doesn't exactly say much about the novel, and in fact, seriously underwhelms me. I think I was expecting something like the cover of Burning Dreams, though I'm not sure which actress I'd think of being there. (I also had an idea of the Vulcan IDIC and the symbol of the Romulan Empire on it, showing both sides of Saavik's heritage, rather than just the picture of a Vulcan cityscape that sorta reminds me of the planet-city of Taris from KOTOR more than anything else...)
The others look very nice - each one gives a bit of a hint as to what's going on in the book. It's just the cover for Unspoken Truth, which is one that I'm really looking forward to. I hope that's purely a placeholder.