Behind the Hill by B. Ivy Woods

A computer programmer desperately searching for her best friend teams up with a PI who has an explosive secret that he must keep hidden.
It’s 2097 and Naomi Porter decides this will be her year. However, self-improvement goals are thrown out the window when the computer programmer’s best friend goes missing. When private investigator Reed Wright appears at her front door promising to help, the quiet life she envisioned is rattled. The easily understandable language of computers is replaced with chemistry that could set her life ablaze. As Naomi and Reed get closer, a complicated mystery begins to unravel. The answers could lead her into more trouble than she ever expected.