Hello, my name is Mark Reha, founder and CEO of On The Edge Software Consulting. Over the course of a 40-year career, I held a variety of senior technical and leadership roles in the high-tech industry and served as a professor teaching software engineering in higher education. A career built equally on technology and the belief that knowledge is best shared through clear, engaging instruction.

This website is the product of both. My historical research on Central Arizona covers Prescott, Chino Valley, Cottonwood, Humboldt, Jerome, Mayer, and several nearby ghost towns. What makes this project distinct is how it is presented. Rather than a static archive, my technical background uniquely positioned me to harness modern technology as a storytelling medium, transforming years of research into a truly immersive and interactive experience. Virtual tours, detailed maps, curated photographs, and research papers bring each community's story to life within the actual landscapes where that history unfolded, in ways that traditional historical publishing simply cannot.

My research traces each community's development through its general history, business districts, railroads, railyards, and mining activity. The goal is to apply the same principles that have guided my career, technical innovation and a commitment to education, to the preservation and sharing of a region's history in ways that are as accessible and engaging as they are informative.