The Most Important Book of the Past 30 Years?

I'm probably going to have to go with Robert Higgs's 1987 magnum opus, "Crisis and Leviathan". More than any other book of its kind, this volume underscores and chronicles how governments (ours, in particular) manipulate (and in some instances, manufacture) crisis situations; wars, natural disasters, bank panics, etc. to enhance their power and limit individual freedom. And the fact that it was so predictive of our current situation with power-hungry Presidents like Bush and Obama makes it even more relevant, I think. Please, read this book.