THEY have been called mystical, awe-inspiring, one of the seven wonders of the ancient world. But it is safe to say that in the 45 centuries the great pyramids of Giza have cast their formidable shadow over the desert, they have never before been described as a cuckoo clock.

But that is what Jean-Pierre Houdin said as he lifted his tall lanky body up the steps into the pyramid of Cheops, the largest of the three pyramids high up on the Giza plateau overlooking this teeming, ancient city on the Nile.

Mr. Houdin selected the pyramids as his vehicle for personal reflection, as the salve for his midlife crisis. His was an analytical venture, a quest to explain what appears impossible to prove, at least given the current public record: exactly how the ancient Egyptians built the pyramids using about 2.5 million stones, each weighing at least several tons.

Now, eight years later, he is ready to present his findings, one step at a time, and in doing so will be remembered either as the man who unlocked the secrets of ancient brilliance or as a bit of an eccentric who merely indulged his imagination.