Parasitology books in order

The Parasitology trilogy by Seanan McGuire (as Mira Grant) follows the terrifying consequences when genetically engineered parasites designed to maintain human health develop consciousness.

Reading order

# Title Published Author Buy on Amazon
1 Parasite 2013 Seanan McGuire Buy
2 Symbiont 2014 Seanan McGuire Buy
3 Chimera 2015 Seanan McGuire Buy

The Parasitology trilogy, written as Mira Grant, explores body horror through a science fiction premise. In a near-future world, a biotech company has created the Intestinal Bodyguard — a genetically engineered tapeworm that manages its host’s health needs. Parasite (2013) introduces Sal Mitchell, who woke from a coma with no memories and a perfect bill of health, just as reports emerge of implant recipients losing their minds.

Symbiont and Chimera continue the story as the parasites evolve in unexpected ways and the line between host and symbiont blurs. The trilogy combines McGuire’s biological fascination with genuine horror about the boundaries of identity and what it means to be a person.

Frequently Asked Questions

How many books are in the Parasitology series?

There are three books in the Parasitology series, published between 2013 and 2015.

What is the first book in the Parasitology series?

The first book in the Parasitology series is Parasite, published in 2013.

What is the Parasitology series about?

The Parasitology trilogy — Parasite (2013), Symbiont (2014), and Chimera (2015) — follows Sal Mitchell in a near-future world where genetically engineered tapeworms called SymboGen implants manage human health. When the parasites begin developing their own intelligence and taking over their hosts, Sal must confront disturbing truths about her own identity.

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