Leviathan Falls is... difficult to sum up. The ninth book in The Expanse series has been a long time coming and stands as a remarkable achievement regardless of quality. With that said, and as someone who's followed this series from the third novel, Falls is also the most boring 'epic conclusion' to a long-running series that I've ever read. There will be unmarked spoilers throughout this review.
The Expanse series has always had a few recurring issues. Uneven pacing, prosaic insights, and shallow characterization. Plots that are too thin for their word count. A feeling that the series is repeating itself, repeating itself, repeating itself. All of these are present in the final book in the series. It is somewhat disheartening but not surprising. The Corey team has a formula that's worked so well for them so far, so, one shouldn't expect them to change it--and yet...
Perhaps the part of the novel that was surprising was the overall thrust of the novel and series, especially as Falls gets into some of the topics that the previous eight books have refused to really engage with--such as the Protomolecule, the mysterious builders, and the even more mysterious beings that killed them. For some of this, the Corey team has said that The Expanse is not interested in sci-fi extrapolation as much as it is human characters and relationships. But I feel that Leviathan Falls reveals that, perhaps, the Corey team simply wasn't capable of actually writing about the more esoteric sci-fi ideas in the series.
The thing that struck me most about Leviathan Falls was how long it took to get moving. At 25% of the way into the novel, I jotted down a note that I was surprised how little had happened, and I am someone who has a fair amount of patience for slow-burning stories. To be completely honest, I was skimming more than a few chapters. The story is primarily split into four perspectives--Tanaka, Naomi, Elvi and, of course, Jim Holden. Colonel Tanaka of Laconia is tasked to find the returned-to-awareness High Consul Duarte and decides to focus on capturing his daughter, Teresa Duarte, to get to him. As Teresa is with Holden, known enemy of Laconia, this is a bit of a conflict. This little plot constitutes the first half or so of the book and is fairly irrelevant to what comes later. Meanwhile, Elvi's chapters consist of fairly meaningless exposition about the mysterious builders and what killed them, like it was written to give the fans something to pore over. Jim and Naomi just kind of wait for the plot to happen while evading Tanaka more through luck and circumstance than skill or planning. There are other perspective characters scattered throughout and they're all kind of odd--especially Kit.
The plot kicks off about halfway into the novel, and it's actually somewhat interesting. And yet it also feels like a letdown. Unsurprisingly, High Consul Duarte functions as the primary antagonist with the mysterious consciousness-devouring 'goths' relegated to a storm in the distance. Like most Expanse protagonists, Duarte's trying to do something abhorrent in the name of what he thinks is the greater good. Unlike most Expanse protagonists, his plan is merely abhorrent instead of abhorrent and stupid, so, he's somewhat more intriguing than those who have come before.
And yet he barely features in the novel. And, to be blunt, the idea of the final novel consisting of stopping Duarte feels rather weak after what the previous novels had set up. To return to the previous idea I raised--it isn't that the writers wanted to do it, it isn't that their plan ended with Tanaka snapping Duarte's neck, but that they couldn't deliver on the idea of a weird sci-fi odyssey to stop the beings from outside time and space. This can also be seen in The Dreamer interludes in Falls, which are remarkably obtuse and a pale imitation of the wonderful Investigator interludes from Cibola Burn.
Leviathan Falls is held back by another recurring issue of the series--that is, an inability to take chances or risks. A clear example of this is the character of Amos. While he is one of my favorite characters, and a general fan favorite, he is a character who should've stayed dead after he was shot in the eighth book. He's practically a walking plot device in Falls, and his reveal in the epilogue is more eye-roll inducing than touching or interesting. This is part of the reason why I found Falls so disappointing. For a final novel in an epic series, it all feels remarkably safe.
Another issue that harms the novel is an inability to treat the reader like they're smart, like they've read eight books of this epic and have some familiarity with the setting and events that have transpired. For a novel that should be an epic conclusion, the novel spends far too much time reiterating things we've seen before. Frankly, every major set piece within Falls feels like we've seen it before. Given that we are nine books into a series, one could argue that's to be expected, and yet...
There are some big moments in Falls, however. The thing is, they feel like they've been coming for a long time and therefore some of the effects are lost. I laid down a set of predictions before cracking the book open and, checking them again now, I had a hit rate of seven out of eight. Is this bad? Not necessarily. But it comes back to that core complaint that the novel is just kind of boring. It's the last book in an epic series and it resolves, well, pretty much exactly as you think it might. There's something good in that, but there's something disappointing, too.
One thing that did surprise me was how the writing had slipped. This is not usually an issue I had with these novels--the Corey team has always been consistent and competent. Perhaps it's the usual issue of experienced talent longer getting good editorial feedback now that they're successful, I'm not sure, but there were more than a few times where it felt like a chapter or scene had a perfect line or moment to end on... and then continued on for three or four more lines, really deflating the energy of the section or effect of a particular line. It was also more than a little annoying at how many chapters would retell sections of chapters immediately previous.
So, what's the final take on Leviathan Falls? It's tough. Is it terrible? No. It's not a bad ending but it's also not a particularly great one. While the conclusion may make people think of Mass Effect 3, it isn't close to that kind of failure. It just needed some better planning and pacing and less aversion to risks. As it is, it's a very safe entry that will please fans without risking anything controversial or memorable.
When I ended Tiamat's Wrath, the eighth book in the series, I had the distinct impression that Leviathan Falls would be rough, if only because of the sheer amount of ground it would have to cover. In the end, the conclusion to The Expanse feels like a condensed version of a story that should've been spread across multiple novels. There isn't so much the sensation of jigsaw pieces falling into place as new pieces being hastily cut to fit and slammed into the puzzle.
There's a comment on Reddit that sums up the whole book and ending perfectly, I think. "Can't go wrong with an ending that isn't an utter dumpster fire, right?" Leviathan Falls is not a bad ending but it's remarkably only in the sense that it isn't a dumpster fire. I don't think I'll ever think about it again, and it won't be a part of the overall series that I remember fondly.