"In order to preform magic, a book of enchantments is needed, as the magic is only able to be used at the user's vocal command. A wave of energy with flow into the rune and then be released at the right tone and direction of the command."

Could anyone clarify this for me? As I understand it, I literally must have a book of enchantment with me, me reading out the spell, in order for me to use it - is that right? Can I not summon a spell at will... if I have the book in my backpack, or have casted it before? How does this work?