This is the fourth novella in the series titled The Murderbot Diaries. It was released 2 October 2018 by Tor. This has been a highly successful series, including the Hugo and Nebula winner All Systems Red, followed by Artificial Condition and Rogue Protocol. A full length novel continuing the story is scheduled for release in 2020. This review contains massive spoilers.

At the end of Rogue Protocol, Murderbot has safely escaped Milu on Ship. Since Ship isn’t all that bright, it monitors Ship’s inputs as they approach HaveRatton Station. When Ship is directed to divert from its usual dock by Port Authority, Murderbot uses an evac suit to leave through the cargo module airlock and enters the station through another docked ship. The diversion turns out to be about a large security force waiting for some rogue SecUnit. Hm. Safely on its way, Murderbot checks the newsfeeds and finds that GrayCris has charged its owner Dr. Mensah with corporate espionage and that she is now missing. Intensive research suggests this is about the data Murderbot collected on Milu, and that she’s being held on TranRollinHyfa Station where GrayCris has its corporate headquarters. Murderbot uses an ID chip and a hard currency card it took from hired killers Gerth and Wilken and catches a fast passenger transport for TRH. Once there, it identifies a bond company gunship sitting off the station. Pulling a status report, it finds the ship has been refused dockage by the station, but a shuttle from the ship has docked. Drs. Pin Lee, Ratthi and Gurathin are on the station attempting to negotiate Mensah’s release. Can Murderbot get her out of GrayCris’clutches without getting caught itself? If so, then what?

This continues the story arc with the same great features of the other novellas. The world building is notably excellent, as are the characters. Because it’s written in first person, we have the advantage of Murderbot’s wonderfully entertaining viewpoint. Not only is it getting much better at impersonating a human, but I’m suspecting that “comm interface” component ART made up for it provides a lot of extra processing power. We’re also finally seeing why rogue SecUnits really are dangerous, as Murderbot casually hacks its way through the station’s protected systems while simultaneously outwitting GrayCris’ security force and carrying on an apparent love affair with Dr. Mensah (just like on the media shows). Once it’s trapped, the violence escalates, and it doesn’t want to shut the aggression down. Only Mensah’s tenuous hold on it keeps things together. There’s been a rising action line through the whole series, and this caps it off nicely.

On the not so great side, I’ve got some nits to pick with the whole story arc at this point. I suspect the series was written fairly quickly, as Wells has said it’s a short story that got out of control, and after the huge success of the first novella, she quickly got in gear to produce the rest. Tor was also in a hurry to follow up on the initial success, and went light on the editing. That means there are some inconsistencies in the content. 1) ART’s modifications included reducing Murderbot’s height by either one or two centimeters; we’re not sure which. 2) The sampling device that tried to capture Don Abene in Rogue Protocol snatched her helmet away, but later she has it again. 3) In Exit Strategy, the Preservation group plans not to mention Murderbot is a SecUnit so there will be no questions about citizenship, but somehow Mensah’s daughter knows. Also, the plan to produce a documentary (presumably what this series is) will also reveal this issue. Hello? 4) At the end of Exit Strategy, what happened to Murderbot’s projectile weapon? I can’t believe it left that behind, but it just sort of disappears. 5) At the end of Exit Strategy, was it struck by shrapnel or a projectile? It says both in different places. 6) In Exit Strategy, I didn’t quite believe the scenario that led to system failure. It seems like a processing overload would have just led to burnt out capacitors. Extending into a different system should be done with copied code, right? Like a virus? And that shouldn’t jumble up the original code, right? Somebody who knows about AI architecture help me out on this one.

Highly recommended. Five stars.

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