When two girls disappear on a remote stretch of Montana road, former police investigator Cody Hoyt and his former rookie partner Cassie Dewell begin an investigation that will lead them into the hunting ground for a killer whose viciousness is outmatched only by his intelligence.

"White and red sandstones, green shales, and pink granites are hard to appreciate in black and white. Two-color maps cannot do justice to the many patterns in the bedrock geology. A state with places like the Painted Wall, the Florissant Fossil Beds, and the Maroon Bells deserves a color edition. That is why Mountain Press teamed up with authors Felicie Williams and Halka Chronic to produce a color edition of Roadside Geology of Colorado. The updated...