"Sarah Zellaby has always been in an interesting position. Adopted into the Price family at a young age, she's never been able to escape the biological reality of her origins: she's a cuckoo, a telepathic ambush predator closer akin to a parasitic wasp than a human being. Friend, cousin, mathematician; it's never been enough to dispel the fear that one day, nature will win out over nurture, and everything will change. Maybe that time has finally...