Mirror, Mirror — Les Edgerton

You will never again pass a mirror without a slight chill... once you have read Mirror, Mirror. Elizabeth Mary Downing is a typical American teenager...almost. When she peers into a mirror, she sees someone else staring back--an image identical to herself in every detail save one--the mirror image has blue eyes. Elizabeth's eyes are brown! She is told by her mirror counterpart, "Liz," that she can enter any mirror she wants through "trans-starence” and when curiosity prevails over fear and she enters the mirror, trading places with Liz, the horror begins as Liz wreaks havoc with what was a normal life. Elizabeth's attempts to trick Liz into going back into the mirror reflect both suspense and humor and just when all hope seems lost, she succeeds... only to discover she has to return to the mirror to reverse events and get her life back to where it was. She succeeds… only she leaves part of herself forever in the mirror.