that newest SGA tie-in novel, Entanglement
After seeing a rec by iamza I've now read Entanglement by marthawells. It's a fast-paced action-adventure set in the second season shortly after Ronon joined the team, with an interesting plot involving Wraith, Ancient tech, and some history of the Ancients leaving Pegasus, and I enjoyed it quite a lot. I think I would have like it even better if Teyla had had more to do (but then I think that of the show a lot as well), but plenty of Sheppard kind of made up for that to me. Anyway, it was fun to read.