For me, I have several things going. I'm actually reading the Great North Road which is a pretty decent mix of mystery and science fiction. I'm really enjoying it, but it's starting to drag a bit about 3/4 of the way through. I'm hoping that something picks up. I think the issue is that they've built up suspense and mystery and I'm starting to feel that the answers to all those questions are going to be uninteresting.
In my car, I just happened to pick up Allegiant by Veronica Roth which is just alright. I loved Divergent, but the two after that are just not nearly as interesting. I actually find Allegiant to be slightly annoying in it's presentation of a fairly complex topic (genetic alteration), but it's alright. It seems like it will be a solid 3/5.
-Nick.