Excellent stuff. Really enjoyed part 1 (Gemsigns) and this sequel is just as good. It's clever social commentary disguised as sci-fi. It's also a thrilling read with a race to the finish. I love the plausible future Saulter has created, and I also love that main characters include a gay couple and an autistic man/boy. You have to read it with due attention, though, because there is quite a bit of tech-speak (i.e. I don't have a degree in molecular biology, but I did manage to follow the genetics talk, mostly), so make sure you have time for this one.