Professor Andrew Hueser enlists his younger brother Peter and four other students in a special project, keeping the school board in the dark as to his true find, alien technology. Upon assembling the equipment, he expected it opened a doorway to another planet or dimension. He was wrong. When stepping through the Door of Light their bodies are transformed into a ghostlike state. Adventurous, they set-out to explore Hollywood as if ghosts. What they discovered is horrific. They had opened a Passage into a ghostlike state of existence where Fallen Angels are imprisoned. On the run, they must make it back to the college alive, through the Door of Light and shut-down it to prevent a massive prison break. Aliens, Angels and Fallen Angels fighting an ongoing Ancient War, their prize humanity caught in the middle and not fully comprehending what is at stake. From all side it becomes a Mad-Dash for the Door of Light. Casper Parks has woven a compelling character driven story that is fast-paced and action-packed. ***Bestselling Author Ralph Cotton, "Perceptional Threshold delivers all of the right elements essential to good enjoyable fiction. Parks' work doesn't present itself as a debut novel, but rather as the efforts of an old hand and authority unique in presenting this fascinating look at the dimensional realities surrounding us in a cosmic forward roll of cause and affect."***