Axis (novel)

Axis is a science fiction novel by American author Robert Charles Wilson, published in 2007. It is the sequel to Wilson's Hugo Award-winning novel Spin (2005) and the conclusion of what is often referred to as the Spin trilogy, although it is only directly connected to Spin and not explicitly intended to be the final book. The third novel, Vortex (2009), expands on the universe established in Spin, but its connection to the events of Axis is less direct.

Axis focuses on the descendants of the characters from Spin, primarily Lise Adams and Turk Findley. It explores the consequences of the Hypotheticals' terraforming of Equatoria, the equatorial region of Mars connected to Earth by the Arch, a mysterious alien construct. The Arch, previously used for trade and travel, has become unstable, and its operation is fraught with peril and uncertainty.

The novel delves into themes of colonization, environmentalism, the nature of humanity, and the unintended consequences of technological advancement. It also explores the complex relationship between Earth and Mars, and the economic and social inequalities that arise as a result of the interplanetary connection.

The plot revolves around Lise's journey to the remote island of Equatoria where she investigates the strange phenomena occurring in the region. Meanwhile, Turk grapples with his own personal demons and his connection to a powerful organization that seeks to exploit the Arch for its own benefit. Their paths intertwine as they uncover the secrets of the Arch and the true nature of the Hypotheticals.