Head On by John Scalzi

A Novel of the Near Future

In a world where a mysterious virus has left a portion of the population "locked in" their bodies, technology has advanced to allow these individuals to interact with the world through robotic avatars known as "threeps." The story follows FBI agents Chris Shane and Leslie Vann as they investigate the suspicious death of a professional athlete during a high-stakes game of "Hilketa," a violent sport played by threeps. As they delve deeper into the case, they uncover a web of corruption and deceit that challenges their understanding of identity, consciousness, and the lengths people will go to for power and profit.

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