This is second in a sci-fi adventure story. If you don't read in order, nothing will make sense, even though the author did a great job with the remindery bits in the first chapters.
This is maybe the perfect example of middle book syndrome. It meanders. The plot loses direction. Lots of kinda random things happen. And it doesn't help that the skyway is, at this stage, a one-way trip since Jake and friends are beyond anything they have maps or knowledge of.
It doesn't help that the author's thumb is heavy on the scale of events at times. Like, there are a couple of people who really need to die. And a time or two where Jake has them dead to rights. And then something happens and they get away. I don't know if this is an authorial quirk, but it struck me while reading how contrived it was that some truly horrible people just kept on keeping on way past where I was tired of them cropping up over and over. And I really don't need more torture scenes to cement how awful they are along the way (not on-screen, but plenty of aftermath with concomitant emotional trauma). And this is only the most frustrating example of thumb-on-scale. Some random things are just very convenient and it kind of stands out when the story is meandering.
And I hate to say it, but I very nearly stopped reading in the middle of this. Even though I can't wait to get to the good stuff. I seriously contemplated skipping to the next book. It doesn't help that Jake spends this book screwing around with (yes, literally) Susan and being a bit cold to Darla. Yeah, Darla has some questionable interactions and motivations. But have the conversation, clear the air, and take a shot, you blockhead!
I stuck it out because I like the story and the characters are still fun. Plus, I want to see how the paradox resolves. Yes, I know how it resolves. Even my memory will have things stick with how often I have read this series. And I can't wait to get there.
I was going to find some way to round this up to four stars, but after writing all this out, I'm just not up to the task. Three stars it is.
A note about production and publication: I only caught one place where an obvious OCR error crept into the Kindle version this time. It's is much improved from the first book. I don't know if they scanned a more pristine copy or if they were just better at the editing, but I was completely relieved to see the quality improve.
A note about cosmology: I don't think I've ever caught this before, but a lot of the astrology astronomy discussions of this are patently absurd. And would have been absurd at the time of writing. Yeah, our observation of the universe is hampered by the speed of light so our view of distant galaxies come from millions of years in the past. That doesn't mean that the roadway expands into the past, though! The roadway moves you in space, not in your observation of space! You aren't following light back to its source. You're taking an alternate path. Man this bugged me every time someone mentioned that they were going back to the start of the universe on the skyway. This is stupid.
A note about Steamy: There's less explicit content while Jake screws around with Susan (still literally). It's enough to trip the steam tag, but on a very light setting.