Parasite (Grant novel)
Parasite is a science fiction novel written by Mira Grant. It was released on October 29, 2013 by Orbit Books and is the first volume of the Parasitology trilogy. The other two books in the series are Symbiont and Chimera.
The book, in the tradition of fictional parasites, envisages a world where people's immune systems are maintained by genetically engineered tapeworms.
