#1) Why has Machiavelli’s The Prince evoked so much discussion and controversy?
Answer: The reason why his book evoked so much discussion and controversy was because he stressed that a ruler's right course of action was to use whatever means necessary to achieve the goals. Even if they required extreme measures. He believed in “The end justifies the means”
#2) What do readers find enlightening, terrifying, or disturbing?
Answer: What readers find enlightening, horrifying, and disturbing is the philosophy by which Machiavelli truly believes a great rulers should do. This is very apparent just from what he sees as the 3 primary values in for a ruler which are Fame, Power, and Glory.
I hope it helps, Regards.
