Remnants — Michael Hodges

Bishop thought it was over. He was wrong. One year after the attempted ecosystem invasion, Bishop, Angela, and Yutu are trying to return to a normal life in Montana's Apex Valley. But one night, while hiking behind Big J Ranch, Bishop witnesses a red blinking light deep in the woods. After calling up his good friend Colbrick, Bishop learns the government has set up fenced quadrants in the national forest, and there are wild rumors of experiments and dangerous new species. Before things can get worse, Bishop, Angela, Yutu, and Colbrick set out to stop any remnant invasive before their flashing red tags reach 200 BPM and send an "all clear for full invasion" signal to the master species.