Surprising, unusual world and heroine. The heroine is a cyborg blend, transformed by the government after nearly fatal injuries, and is now unable to contact people from her old life. Reasons for that still remain unclear to me, but it's used to as a device for emotional isolation. For those who like the romantic push-and-pull relationship, one develops between the lead character and the elf she is bodyguarding. It is definitely an immersion story, requiring attention and concentration; this is not a book to pick up and read one chapter a week if you want to follow the worldview.