You should go into this book knowing nothing beyond the basic description on the dust jacket because wowee, it's a bit of a ride and it's good if you don't know what's coming. I loved Mars, the gender-fluid MC, and really appreciated the depth with which the author wrote him. The body horror is definitely intense. I don't want to say anything else about the characters or the plot, but I will say the book is beautifully written. This book doesn't quite make it to 5 stars for me, only because ~90% of the book is a slow burn (a very enjoyable one) and then everything is kind of crammed in at the end. I'll definitely be checking out this author's other books!