The Routledge Guidebook to Machiavelli's the Prince

Niccolò Machiavelli's The Prince is one of the most influential works in the history of political thought and the adjective Machiavellian is well-known and perhaps even over-used. So why does the meaning of the text continue to be debated to the present day? And how does a contemporary reader get to grips with a book full of references to the politics of the early 16th Century?