Nettel describes the novel as a metaphor for Mexico City—a "monstrous being" with both charming and underground faces.

The novel was a finalist for the prestigious Premio Herralde de Novela in 2005.

Nettel focuses on the beauty found in the "abnormal" or "monstrous," exploring those who do not fit into conventional society. Key Highlights

It is celebrated for its precise, surgical prose and its ability to blend the everyday with the uncanny. Digital Availability

You can find the version through major retailers and digital libraries: Official publisher page at Editorial Anagrama.

Ana wages a lifelong internal battle against this "Siamese twin," trying to maintain her identity while knowing she will eventually be consumed.

The narrative moves through family tragedies, the sensory-deprived world of the blind, and the dark, subterranean depths of Mexico City's metro system .

The story follows , a girl who believes she is inhabited by a disconcerting being she calls "La Cosa" (The Thing) . This "guest" is a silent parasite that dictates her behavior and gradually takes over her life, manifesting in increasingly devastating ways as she matures into adulthood.