Peter Drucker will be one of the most enduring business minds of the 20th Century. But Drucker was also in love with nonprofit organizations, seeing in them the best of our democratic society.

Now, Drucker's classic, The Five Most Important Questions You Will Ever Ask About Your Nonprofit Organization, has been reissued and updated. Enjoy his sage advice once again along with commentary from a range of today's business and nonprofit thinkers.

• Planning Is Not an Event: How Nonprofits Can Achieve Results