This would actually be 3.5 stars, mostly because I couldn't decide whether or not I liked one of the main plot points. As tempted as I was to give it 4 stars because I really enjoyed so many other parts of the story, it just didn't quite feel right. The part that I couldn't really pin down were the other metahumans that Professor Zoom collected. I wasn't sure how I felt about the "lightning" (speed force) choosing them in ways that deviated from super speed. The other people who have been connected to the speed force all had powers that were much more closely related to speed, but theirs...not quite as much. I mean, there were connections--aging, centripetal force, slowing down atoms, and teleportation--but those all seemed to stretch the core idea of the speed force (you know, SPEED) a little too much for me. But, on the other hand, it was kind of refreshing to see a different take on what the speed force could do. I mean, DC invented it, they can make the rules, why not really play with it? So, yeah...I couldn't decide whether I liked that or not. I also had a hard time wrapping my head around the time travel part. I've read/watched enough "Doctor Who," so you'd think time travel wouldn't give me a headache. I'm not sure whether this is a plot hole in this series, or if I'm just missing something in the timey wimey-ness of it all. Here's my point: In a previous volume, when Future Flash went into the past, he wanted to kill Barry Allen. Theoretically, if he did that, he wouldn't exist to have gone back in time to kill himself in the first place. However, he claimed he actually COULD kill Barry because, since he went back in time, this was a different timeline. (Or something generally like that.) But, in this volume, Zoom goes back in time and basically creates the Barry we know by killing Nora Allen. Zoom implies that he came from a future where Barry had a loving mother and father and that he went back in time to "level the playing field" between the two of them by ensuring that Barry's childhood would mirror his own. (He would make it seem as though both had fathers who murdered their mothers.) So: Zoom goes back in time, changes the past, his future is changed. Future Flash goes back in time, changes the past, the future is changed...and he doesn't exist in the same timeline any more? That doesn't quite add up to me, so if somebody has a way of explaining it, that would be awesome. But, a part from that, there were a lot of other elements I really enjoyed. For starters, Zoom was a pretty great villain. During this volume's last issue, it was fascinating to see Zoom's "before" alongside his and Flash's fight. The further into his history we went, the more we understood his mangled psyche. I also really enjoyed getting to know Henry Allen a little better. Plus, any sort of prison escape story is always fun. And, even if I can't decide whether or not I liked Zoom's "collection," I did like the idea of the Flash going up against people who had been specifically trained to fight him. All in all, a solid read, even if it left me with some questions.