John Scalzi’s near-future thriller Lock In throws out plenty of larger issues to consider in regards to robotics technology: where the consciousness truly sits, the civil and legal rights of non-human humans, the definitions of disability, and how current societal expectations of class and wealth affect these issues. What may not become immediately apparent to the reader, even after finishing the book, is what Lock In has to say about how the fluidity of gender would evolve in a world where one can exist separately from one's body.
By virtue of being a procedural thriller, Lock In is a quick read, and it’s easy to miss this aspect of the book, especially because the reason it is notable is primarily due to its absence. We see the main character, FBI detective Chris Shane, in a variety of mechanical bodies, avatars, and briefly in the flesh. We are given a multitude of perspectives with which to define Chris.
Spoilers ahead for Lock In. Make sure you've read the book before proceeding.