Carte - Persona 3, Volume 1, Paperback/Atlus

Between one day and the next, inserting itself into reality at midnight, sits the Dark Hour. Few know about this special time that separates humans from the dangerous creatures known as Shadows. It is here that a group of students finds the ability to summon their inner selves - their "Personas" - to do battle with the Shadows before they can consume the minds of humanity.