This proved a disappointing read. This book is the adaptation of the story surrounding the "Ronin" short video from the Disney Star Wars "Visions" series. (writing this extemporaneously, so there may be spoilers hereafter).
The video "Ronin" was fun to watch, and had the book just stuck to building upon the story line and persona of Ronin in the video, then this novel would have been all I was expecting it to be. Ronin is a rogue Sith, a master swordsman --- something of a blend of Darth Maul fighting prowess and the itinerant samurai from Japanese history, Miyamoto Musashi. Background: occurs approximately (as near as I can guess) about 1,500 years before the Battle of Yavin (i.e. Star Wars Episode IV). The Jedi and Sith Orders are much different than as depicted in typical Star Wars canon. The Galaxy is governed by an "Empire" --- its protectors and guardians, the Jedi --- who seem to operate more like members of the samurai in Ancient Japan. The Sith --- depicted not so much as "dark" or evil, but more as rebels and outcasts relative to the order enforced by the Jedi. The Ronin --- a rogue member of the Sith. So far, just an alternative take on the Star Wars franchise that had real potential to be a refreshing one.
The book could have benefited from a prologue explaining where this book fits in with the Star Wars timeline and the background behind the story. It doesn't really do that within the plot, and, in my opinion, leaves the reader grasping at context for too long as it develops.
There are too many characters in it --- it would have been better if the story focused on Ronin instead of the others. However, as a result, neither one is much developed such that I found myself little caring about any of them.
The Jedi are generally portrayed as hidebound and dense. The Sith characters are generally portrayed as not so bad. And I have a problem with that. If you're a Sith, then you are someone who has bought into the deal of utilizing passion, anger, fear, hatred, and ambition for purposes of advancing oneself. Therefore, the best you can do is write a story about them as antiheroes. Drew Karpyshyn in his "Darth Bane Trilogy" probably does the best job of mastering the delicate balancing act of getting you to cheer or sympathize for the main character, a villain, even as he never foregoes reminding you that he's not someone you should be supporting. This book skirts that --- clearly the main characters are Sith --- but they don't act like Sith. When summoning the Force, it lamely says they summon "the black current" without showing how a Sith would really do that --- with the Dark Side of hatred, anger, passion. It's like YA novels about novels about vampires depicting them more like super-fairies than as bloodsucking members of the undead preying upon the living.
The plot made little sense to me. There seems to be a quest about what brings them together, but I just couldn't see the urgency in what they were trying to achieve or why anyone should care. There are things that make little sense. For example, after a light saber duel between Ronin and a Jedi master, Ronin ends up being taken captive aboard the Jedi's star destroyer. After failing to convince Ronin to come to the light side of the force, he just turns Ronin loose aboard his ship, knowing he's Sith --- and Ronin predictably proceeds to destroy the ship. Makes no sense --- a Jedi master supposedly -- a master of the Force --- doing something so stupid. Like capturing Darth Vader and turning him loose in the middle of the Rebel base.
Then there's the character, "the Traveler". If you think about it, Star Wars has had non-binary characters from its very beginning -- the droids. And, even though they don't have sex or gender, there's been certain conventions in the franchise, for how they're referred to: the singular --- either "he", "she", or "it". It's for clarity, obviously. And in the Star Wars universe, with it's plethora of sentient alien species, there's no reason, that some of them couldn't be much different from normal human gender conventions --- you could have some that are hermaphroditic, asexual, genderless, etc, etc. So I don't see having the character of "The Traveler", being from an alien species, being cast as "non-binary" as a big deal. HOWEVER, the problem arises with the author's insistence of referring to the The Traveler with plural pronouns like "they" and "them".
If the Traveler was a minor supporting character, then that would not a problem. However, the Traveler, evidently a dissident Jedi, is ubiquitous throughout the plot, and the plot has multiple characters in it. So this makes it extremely confusing to read. In some passages, "they" means the group. In others, in the same chapter or even the same paragraph, it variously could mean either the Traveler or the group. How do you know which is which? A lot of the time you don't unless you re-read the same page to get your bearings on who's doing what. A little of this --- a minor nuisance. Through 300 pages of it --- for me, it makes the book unreadable and baffling --- especially in an action sequence --- like fighting, or escaping or something like that. On top of that, the Traveler is just a poorly developed character. For example, why does the Traveler wear a fox mask? We don't know --- and we're never told.
After slogging through this, for about the first 200 pages, it was headed to a 2-star rating until the climax. Well, the climax and conclusion of this book are a hot mess --- so that gets it a one-star. Between the ambiguity on pronouns and the characters seeming to alternate between reality and visions/ trances (?), I was lost on what was going on, but by this time, didn't much care.
So, in closing, I don't recommend this book for Star Wars fans. Watch the Visions short on Ronin -- and, if you like the character, hope that they write a better spin off next time on what could have been a truly compelling character added to the Star Wars universe.