Know this: all the traditions, cultures, rituals, and bodies of knowledge surrounding what we call magic or the occult are wrong. It is hogwash, flimflam, swindlery, and lies. But even so, here and now in the modern world, there are perhaps several dozen sorcerers in existence. They do summon demons and bind them to their will. They do have an inkling, although no surety, about the unnatural laws. You are one of them. Sorcerer is a role-playing game based on the classical archetype of forbidden magic. Each player is responsible for the actions of a character who is a powerful sorcerer in the modern-day world, and so each character comes equipped with at least one demon he or she has bound. Also, at any time, a sorcerer character may try to summon and bind more demons. The superhuman abilities are inherent only to the demons; the sorcerers.
What the Library has:
Core Rulebook
Dictionary of Mu