Switch - Book One of the Janek Series
by William Bayer
Detective Frank Janek immediately knows that he has entered the realm of a lethal madness. Middle-aged, divorced, a man centered solely on his work, Janek is practiced in piercing the minds of the criminals he pursues. In the absence of clues from the killer, he has only the awful symmetry of the crime to work with, only his own finely honed intuition.