On second thought, maybe the parallel universe storyline wasn't quite the kick in the pants this series might have needed.
Several books into it now, it's become slightly less clear what exactly the problem is beyond the obvious "we're in a universe where everyone is wearing insect heads", what the stakes really are and if anyone is behind it, or if the Doctor is doing anything other than putting out fires as he goes along. Even good ol' bwah-ha-ha standby Sabbath gets only a token mention of this book and little else. So what the heck exactly are we doing here?
If we're the author, we're taking a jumbled mess of an arc and attempting to do our best with it, which to his credit he acquits himself well, or as well as can be expected. And if you think that's easy to simply coast on the good vibes this show gives us you can look as recently as, er, the last book in this series to see how the ball can be utterly dropped, as if down the side of an endless mountain.
Here, at least someone is trying. The Doctor and stalwart companions Fitz and Anji wind up in another parallel universe where civilization has utterly crashed. Some people are living in settlements, weird naked savages are running around and technology seems to have become frozen. Meanwhile a weird wispy poet is living in an impossible house which is so amazing that time can literally standstill for you. Impressively, it takes a while before the plot requires everyone to separate, which at least is somewhat a thumb in the eye to the shadow of predictability.
As it turns out, something called "The Cleansing" has occurred, which means that everyone aged like forty years in two seconds, which stinks if you're at all over, say, forty, and really stinks if you're five and suddenly learn what hemorrhoids are. As the Doctor investigates, Anji falls in with people who have exotic eating habits, Fitz has qualms of conscience about the morality of deleting parallel universes and the wispy poet composes absolutely no poetry at all (probably good if the author wasn't so hot at creating his own) but feels really bad about something.
The world itself is interesting and as the mysteries pile on top of mysteries that seems to be enough. Unlike the last few parallel earths, it brings the crew into uncharted territory and keeps them off balance, even if the scenario isn't anything we haven't seen on Earth-like worlds. So it's not totally original but its well-handled and the author handles the details of the new world quite well, unspooling the various surprises and shocks in a way that unveils the local color and keeps us reading. His prose is nicely precise as well, at least in parts, he has a way around a description, so well in fact that it's extremely noticeable in the scenes when he's coasting because those instances feel far plainer.
The book, however, wouldn't be able to sustain itself based on sightseeing and eventually we have to get to something resembling a plot. Unfortunately, this is where things start to fall apart. Not to any catastrophic degree but enough so that the flaws are obvious. For one, pretty much all the supporting characters exist to deliver exposition, not a one of them seems to break out of their initial character mold and while their insights are useful to understanding the world that the team finds themselves in, it doesn't exactly make me care a lick about either of them. The author does his best to give us that emotional angle through Fitz, who has some serious misgivings about replacing an entire world with their own, even if this world is wrecked, but with the world itself not having any grasp on our hearts, it becomes more a hypothetical issue than an actual one.
But at least Fitz gets a point of view to run with. Poor Anji mostly finds time to suffer and run around, if nothing else this book marginalizes her contributions to a somewhat ridiculous degree, almost writing her out for a chunk of it for dramatic purposes, even as Fitz seems to be starting to pine for her as more than friends (the series has danced around with a toe in the water about considering it, probably testing it to see how people would react, though its come up often enough now that I wonder if they're really going to go for it). The interactions between our main principals is entertaining on its own and makes me realize how much fondness the series has built in for me with these people, to the point where I would have loved to see a televised version of these people acting around shoddy sets. Alas, twas never to be.
In the meantime the author tries to make it all tie in with famed civil engineer Isambard Kingdom Brunel, but since he's not that famous unless you're English or a student or architecture, he winds up being a guest star with no real import. I give the book credit for not going with one of the big historical names but his inclusion seems to mostly be about Walters proving how much research he did about his life. As the book starts to shed the mystery that kept it going initially, the plot can't quite pick up the slack, especially when parts of it seem liberally cribbed from Asmimov's "The Gods Themselves" and the solution winds up being so obvious in a "really, that's it?" kind of way you wonder how it took the Doctor two hundred and fifty pages to get around to it. The only scenes that come close to the strangeness I've come to love about the series is in the pocket dimension sections, where we get the eerie sense the rules may have floated away. But even then it barely lasts and except for a brief dream sequence with Anji that hints at the metaphorical symbolism the series can employ when it gets half a mind, we're back into standard, if capable written, territory again. It makes the whole affair seem fairly rote, as if the scenario was conceived and they wrote half a plot around it, with no real sense of urgency other than trying not to get killed. Even all the hand-wringing about slaughtering a parallel universe, even in the abstract, seems to fade away as Fitz has to readjust to being himself again.
It's more readable and entertaining than it has any right to be, but you alternate passages of fascinating situations with ones that feel completely by the numbers, giving you at best an average experience. It's not the complete misfire the last book was (thank goodness) and shows the hand of an actual adult behind the wheel, but the truth is the bones of this arc aren't clearing the heights this series was able to for a brief moment. But maybe it'll wrap up nicely eventually.