Cruz has just been accepted into the elite Explorer Academy, which only accepts 25 students per year. In the midst of his classes on anthropology, science, geography, history, and conservation, Cruz also has training sessions in a virtual reality program designed to prepare the students for real-life exploring all over the globe. Then Cruz starts to receive threats from an unknown enemy, and discovers a mystery in the school. His mother died working in the top-secret labs at Explorer Academy, and Cruz is determined to find out what really happened to her.

I loved this book so much! The adventure, the mystery, the engaging characters, the impressive setting at the Academy… I love it all. But the best thing of all… the puzzles and codes!!! I LOVE puzzles and codes.
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