Ignite is book 3 in the Spark series.
Megan Triplett’s true calling is as a tracker. When asked to join her friend Eden on a mission, Megan jumps at the chance. Megan easily determines that someone in the Luminas community has blazed a trail that seems intentional. When they embark on the mission to track down the person behind recent disasters, Megan encounters two problems. One is keeping Niko and Eden safe from the people that wish to stop the prophecy, and the other is the two men who have made no effort in hiding that they are both interested in more than she might be willing to give.