Kyande — Tiffany A. Flowers

Nandi and Kyande are twin time travelers who live on post-Earth 2050. An evil scientist named Cecil Hawthorne controlled this new planet. He was once considered to be a hero until he secretly genetically engineered superhumans known as Lodes to enforce laws against the world's population. The twins Nandi and Kyande were both born into the human rebellion against the Lodes. In the second book in this series, Kyande goes back in time with upgrades to his previous enhancements to ensure the timeline stays intact. This time Kyande travels back in time to prevent the Lodes from capturing the scientist who helped start the rebellion. As he enters the past, the lodes are already back in the year 2025. Will Kyande succeed? Or will the timeline be changed forever?