From the author of Annihilation, a brilliant speculative thriller of dark conspiracy, endangered species, and the end of all things. Software manager Jane Smith receives an envelope containing a key to a storage unit that holds a taxidermied hummingbird and salamander. Alongside the key is a list of five other animals. The list is signed, "Love, Silvina." Jane does not know a Silvina, and she wants nothing to do with the taxidermied animals. The hummingbird and salamander are, it turns out, two of the most endangered species in the world.