Labyrinth of Night (Near-Space Book 3)

In 2029, an American research team ventures to Mars to investigate an astounding find: a labyrinth older than humanity itself, whose maze of rooms conceals the deepest secrets of the red planet. In the final chamber, strange music plays, as chilling as it is beautiful. It will be the last thing the scientist who discovers it ever hears. As the music rises to a climax, the chamber door closes, leaving him to die in the pitch dark.