Breach: An Analog Novel, Book 3, by Eliot Peper
This is the final of the Analog trilogy, starring ex-hacker Emily Kim, who is drawn out of hiding when she stumbles on a plot to overthrow the corporate empire that provides the ubiquitous global feed. But she learns her old friends have been targeted. If she warns them, she risks being found and being put into danger. In a world of algorithms, Emily must find a way to seek justice--and redemption, in Breach.