This is not my favorite DJ Goodman book, but I liked it. It's a book worth reading if you enjoy stories like Event Horizon. There are a lot of twists and turns, but the author gives sufficient clues to the final outcome of the mystery. The story is often gruesome. Characters die in very gory ways. By the time we hit the end, I wasn't surprised with how things turned out. It was still a bit of an emotional punch to the gut though. Don't enter this book looking for happy endings.
One very important part of the story is incorporation of the ability to change genders (or become agender) using a breakthrough scientific discovery. This idea has been touched on before by Ian Banks in The Culture series, but has a bigger impact overall in this story. Since the technology to switch genders is such an integral part of what happens, I wish there had been a more indepth look into why people would switch genders even if they're not transgender. Also, why would an entire group of people aspire to be agender? I feel like we barely skimmed the surface of a very intriguing world setting. I hope that DJ writes another book in this setting where we can delve deeper into the complexities she created in this universe.