Mystery on the Other Side

Mark and Kathy are a young couple who were childhood lovers. After college, they got married and are still very much in love. He is a banker, and she is a beautician. Mark has been having trouble sleeping, experiencing out-of-body episodes, and eventually goes into an anomaly to a strange place. After he is missing for a long period of time, Kathy has an affair with the detective.
When Mark gets back, he starts helping the police with his psychic ability to track suspects. Kathy helps them as well, and they learn that she is a natural good shot with both a handgun and a rifle. They get involved in some interesting cases and move from the local police department to the FBI, eventually transferring to Washington, DC, to work with the FBI. The story takes many twists and turns through their adventures.