1 star, I put a book down. 2 stars, I wouldn't read again and won't pick up a sequel. 3 stars, I won't read again, but maybe the sequel would move forward. 4 stars, I enjoyed it and would recommend it to a friend. 5 stars, I'll reread it, recommend it, and try to get my son to experience some of the joy this book gave to me.
This is really a 2.5 star book, and I'll explain why shortly.
Monster Girls Unlocked: End Game is the sequel and apparently end to a series that started with the premise of Jace Trimble, a PHD student writing a MMORPG who inadvertently spawns sentient Artificial Intelligences that he pledges to protect and spawns a startup company to make enough money and control the intellectual property so that no one else can take advantage or pose a threat to the AIs. In the meantime his boyish charm, enhanced physique (because telling your mind to make changes, causes those changes to manifest in the physical world) and nearly complete lack of other men in the vicinity allow him to build a harem of quite capable and beautiful women who are both completely fine with his polyamorous relationships and bring all of the technical and business acumen needed to make his business a smashing success.
As with the first novel, Trublood conceives of, and resolves, plot points quickly and succinctly. This makes the read fast, but ultimately dissatisfying, especially with the other faults in this second book.
Ok, the good: It is a pretty quick read, the subject matter is light litrpg/cyberreality, and it has some decent mature themes and scenes.
The bad: Justin leaves a lot of interesting plot concepts in the wastebasket, either because he cannot or chooses not to expand and write a deeper and broader story. Some of them which he alludes to are simply never pursued, such as physical intimacy with the AIs (which could go from ooh sexy fantasy, all the way to "Are AIs able to give consent in a conscriptive environment controlled by the sexual partner?"), how does hacking and cyber intrusion and defense reflect in a virtualized interface, and how does a harem/polycule function in a professional setting where some of the people are not part of the romantic/sexual dynamic? Unfortunately none of these are considered for more than a paragraph before being left unmentioned for the rest of the book. Ultimately this makes the story less though provoking than it might have been, and thus is unlikely to stay in the reader's mind for much more than a day after the book is finished.
The ugly: The editing and continuity of this book (which is an extension from the previous book, but much worse here) are poor, including such plot issues as forgetting that sex had occurred with one of the characters earlier in the storyline, such that it kicks you out of the immersion and entertainment to force the reader to have to reconcile the conflicts. Additionally Trublook refers to locations but get details about them wrong (as happened in his other series, Lust Witches), or simply forgets the geographic layout of his scenes. In the case here the university is in Colorado but the entire scene shifts to Houston with scenes in a few locations that should be in Colorado suddenly transplanted into Texas. Many obvious conflicts (government intervention in a new technology, anyone?) were either never thought of or never mentioned so as to keep the book simple (that word used with intent, and not in a complimentary way). The second novel itself ends in a rushed fashion like Justin had to get it out the door. Conflict is resolved via Deus Ex Machina rather than descriptive prose, or even letting the story expand to a third book. Lastly, some of the dramatic and action plot scenes are poorly considered, such that the reader is again, either going to consider the genius hero an idiot, or will be thrown out of immersion because they see what is going to happen from two pages away (spoiler: hey a different car than our security detail normally drives!).
The series itself could have been a single novel or novella except for the sex and harem padding the material, and if it hadn't had that, it would be a good, if shallow, YA litrpg story. Unfortunately that isn't a good thing.
I'm not sure I'll pick up anything else by Trublood, even though they are free on Kindle Unlimited. There is just better litrpg, harem, and salacious fiction available out there.