According to doctors, not sleeping can have a serious impact on your memory, blood pressure, concentration, and many other aspects of your physical and mental health. But it also, for one doctor and his wife, sounded like a good place to start a medical thriller. In the following email interview, Dr. J.J. Cook and his wife A.J. discuss what inspired and influenced their new novel, Percivious Insomnia (hardcover, paperback, Kindle), the first book of the Percivious Trilogy.