This is the second "part two of three" book I've read in the past couple of months, and, sadly, it fell into the well-established category where the follow-up book is not quite as spectacular as the first. I finished The Strain all in a rush, because it was that good. Sadly, The Fall, DelToro and Hogan's follow-up, was only finished quickly because it was short, and because I checked two books out at once and so needed to get through it to move onto the other one.
After the phenomenal pace and plot of The Strain, this one felt kind of rushed. There were scenes where it took me a bit to understand what was going on, and that kills any edge-of-your-seat momentum that might be building. I won't spoil any plot points, but there was a needless macguffin introduced early on - one that wasn't even hinted at in the first book. It felt too much like a "let's throw this in to move the plot along" kind of thing, and while done right that might have worked, here it was just cliche and rather ham-fisted. Not to mention that it put up not one but two major plot holes that weren't addressed by much more than a hand-wave.
It was also short, too short really for me to understand why this is a trilogy instead of just one big book (unless I want to be cynical). If this second volume had been fleshed out better, then perhaps having three separate books would make more sense. And if the authors had taken the time to flesh things out, it might have made for a better book.
Bottom line, while I liked The Fall, and liked it well enough to both finish this book and move on to the last one in the trilogy, it's raised the stakes a lot for that third book. I'm hoping that one will be more like the first, so I don't find myself wishing they'd just stuck to one book only.