Zero Visibility Possible

The adventure intensifies at a breakneck pace to the shocking conclusion of the Rio Grande Parallax series. Impossible odds face two groups of comrades who have traveled far seeking answers to mysteries. The first company heads for the Saddle of the Mountains of the Sky while the second, a hundred miles to the west on the barren Malpais, is led by Esther. Both groups face deadly enemies and startling enigmas.

Back in Rio Luna, Esther's mysterious disappearance confounds her parents and her f...