I found the book very readable overall, and I was intrigued by the premise, although I found it a bit difficult to keep track of all the characters, even being able to search the ebook to refresh my memory.
The fact that the immigrants are physically dangerous was unsettling to me because of the broader parallels to reality, and for a similar reason, I really disliked the detail that people on mars cared more about politics because the survival stakes were higher. When it became clear that the author doesn’t know how incidence rates work and saw in the reviews that later details also don’t make sense, I decided the remaining 450 pages probably wouldn’t be a good time for me.
This book really wasn’t for me, unfortunately. I found it achingly slow right up to the end, I didn’t much care for the writing style, and I wasn’t able to care about any of the characters or their relationships. In fact, I found nearly all of the characters pretty insufferable. Some details felt awfully underresearched, too, like the air travel from Bulgaria to Paris, a 3ish-hr flight, taking from evening til early morning despite no mention of a layover. Lastly, I would not call this book “gender-bending.” It has far more to do with marriage and relationships than gender, aside from the simple fact that a man and his wife switched bodies.