Full post here, which is brief.
You’ll encounter extremely profound and highly practical advice for those who find themselves in power. I’ve heard it argued that he was quite moral (I’m not entirely convinced), in that he encouraged wise rule by compiling such insight all in one place. (see the previous post on justice and Thrasymachus).
Stanford Encyclopedia Of Philosophy’s Machiavelli entry, which begins with an argument as to why it’s necessary to include him.