What is the theme of Trackers book one by Patrick Carman?

The central theme of Trackers Book One (and indeed the whole series) is the importance of facing and overcoming fear and self-doubt to achieve a greater good. While there's an overarching mystery and adventure with technology and espionage, the core of the story lies in the characters' individual journeys of self-discovery and courage. They must confront their anxieties and limitations to collaborate effectively and ultimately save the world.