The central mystery, of course, was why we needed to be in love at all.

His true nature and purpose comprise the central mystery of the plot.

Because in the final analysis, the book's central mystery is not about what happened to Mary.

No one knows if this letter was even sent, but it has become a central mystery of Beethoven studies.

And a central mystery is where the President will fit in the new mix.

All might be indicators of having passed into the central mystery.

But the central mystery of this period in Canadian history remains.

The central mystery of the case is whether Nestor killed himself or was murdered.

The board did not address the central mystery of how the hole was created.

The play's central mystery, surrounding the death of Billy's parents, nearly gets lost.