Definitely You should read "The general theory of employment, interest and money" by John Maynard Keynes. And from the other side of the economic spectrum try:

Definitely You should read "The general theory of employment, interest and money" by John Maynard Keynes. And from the other side of the economic spectrum try: "Free to choose" by Milton Friedman. Probably, you should also pick: "This time is different" by Ken Rogoff and Carmen Reinhart.