Niccoló Machiavelli was having a down stretch in his career. In order to get back in the good graces of the Medici family, he wrote a how-to manual on politics.
If you’re here, you don’t want to read just some rotten old translation (but you want that too, of course). No, you want the original Italian text too. Amazon to the rescue. A very generous preview (50% I think, and cheap for full access) of an e-book is at Scribd. I’m not going the Kindle route just yet because of the parallel text.