A surprise bestseller that is a rarity -- corny and fascinating all at the same time.

Would anyone think that two '60s Harvard philosophy graduates would be able to put together a book that explains philosophy through humor -- some of it deserving a snare drum beat at the end -- that is dead on delightful?

As one online reviewer notes:

In a section on Aristotle contrasting between "essential" and "accidental" properties, Cathcar and Klein offer this illustrative joke:

When Thompson hit 70, he decided to change his lifestyle completely so he could live longer. He went on a strict diet, he jogged, he swam and he took sunbaths.

In just three months' time, Thompson lost 30 pounds and reduced his waist by six inches. Svelte and tan, he decided to top it off with a new haircut. Stepping out of the barbershop, he was hit by a bus.

As he lay dying, he cried out, "God, how could you do this to me?" [ba-ba boom]

And a voice from the heavens responded: "To tell you the truth, Thompson, I didn't recognize you."

We laugh - why? The answer to the question 'why' gives us understanding about philosophy, ourselves, and the world around us. [end of online reviewer excerpt]

Or did you hear the one about the shadow in Plato's cave?

Heck, every now and then we need a rest from a world gone mad.

So, how can you not end up smiling as you read through a book that is part Henny Youngman meets Socrates?

But, remember, these guys are not making a joke of philosophy. They are actually illuminating it through humor.

Hard to pull off, but they surprisingly do.

And that is why it is an unexpected runaway hit.