Defending Elysium: A Cytoverse Novella (The Skyward Series)

Defending Elysium was a work written by Brandon Sanderson before he was a well known writer. He is now publishing it as it fits into the Skyward universe. 

A phone company "accidentally" discovered faster than light travel. It wants to keep it secret and also keep itself "above the law." Other beings in the universe want to control humanity because they are viewed as "less civilized". The novella centers on Jason White, a phone company employee. He has cytonic abilities, including teleportation and mind blades. There a murder, an alien posing as a human, and another person with "mindblade" powers. The novella has a lot of fun exploring different science fiction tropes before finally revealing that the source of faster than light travel is not what we think it is.