Extremophile: Violet Rain. The Unwinding, #2

Book 2 in the continuing "Unwinding" science fiction series by Juliana Rew. In the 25th century, Virtual Reality expert Violet Rain joins the time-traveling Watchmen, guardians of the precarious truce between warring universes ("The Unwinding: Gin's Story"). To brave the extreme conditions of space, Violet takes on the bio-engineered body of an organism both alien and familiar, the rugged tardigrade, Cheon-Sa.
When a newly detected anomaly threatens a new Unwinding, Violet travels to Earth's past to consult with her ancestor Virginia Sun-Jones, the originator of the truce the Watchmen defend, meeting Janus Parker, the whiz-kid father of Virtual Reality. Fending off attacks from android assassins, the Watchmen soon find themselves facing a powerful new enemy--a godlike entity whose memories of the Unwinding have evoked an intense desire for revenge.
Violet and the Watchmen will have to use every tool in their kit to repair the anomaly and prevent a second Unwinding.