I'm about halfway through this and I'm enjoying it for the most part. Dialogue is a bit explainy as I've come to expect, but I like the single Xenomorph concept up to this point. I'm into the characters for the most part but I want more of Davis. He was--by far--the most interesting character from Defiance. My only real complaints are that I wish Prototype wasn't so dependent on Zula's origin story in Defiance. It's not a fundamental problem, but I don't think Zula realistically thinks enough about the occurrences of Defiance for this book to feel like it's organically connected, rather than kind of forced. For instance, I'm not sure that Dr. Hollis has come up in Zula's interior at all, unless it was quick early on and I zipped past too quickly. Again, I'm only about halfway so I'm looking forward to the rest of the book.