You ask your teacher why it must be a monarchy, and he replies "Because that is the only type of rule that will bring our people under one banner. You may one day very well change how you rule as you see fit, but you must first complete the many trials that lay ahead of you, and our people. As for the other questions I can only answer one of them. Our race has no God as he died, or disappeared long ago all we have is this book which may have some link to our lost Creator.
You sit there, and think for a moment, and then say "To tell you the truth, I don't think I'm cut out to be a king... Then again, I don't think anybody is, otherwise we wouldn't need a revolution in the first place."
Of course, the teacher was holding the book, and he wasn't a king, so that told you something about the prophecy right there, didn't it? Just because Lewis took the book, that didn't mean he had to own up to what people were expecting--and, digging a little deeper, the prophecy only said that the book would make the next King or Queen, not necessarily that the one who held it would be the King or Queen.
So maybe Lewis wasn't cut out to be a monarch, but a vizier? Or something else? That just might work.
"On the other hand, you never know until you try. Better a builder than a warrior, anyway." You then reach out your hand, and the teacher reaches forward, and places it into your hand. Suddenly you feel a jolt of power surge through you, and rip your consciousness out of your body, and into the book. You black out, and after what seems like hours your vision slowly fades back in, but you find yourself not in the teacher's room, but standing on a massive stone platform surrounded by endless darkness from which you can hear laughter, and the sounds of joy, but you can screams, and the other sounds of war.
After taking a look around you hear a voice coming from the shadows, it is filled with power, and you can tell the being who is talking is one of power, it says "You are to be the next one who shall wield my power are you? Or do you wish for answers that only I know before you accept. For believe me you will accept you have no choice." Towards the end you hear a bit of cruelty, and humor enter his voice as if he was excited by the fact you could not escape this fate now.