1.   Unlike real life, the classic mystery has no loose ends.

2.   And take note, dear reader, that some Washington mysteries have nothing to do with doctored tapes and shadowy exchanges of campaign money.

3.   Few architectural mysteries have such tidy endings, and Kahn gave Ms. Gayle the good news.

4.   The current Alexandria mystery probably has nothing to do with spies or suspicious congressmen.

5.   The theme-park mystery may have something to do with real, live spooks.

6.   This crafty, plausible mystery has a human, likable hero, who certainly comes with flaws.

7.   This Matthew Scudder mystery has the unlicensed private eye coming to the aid of a mentally unstable derelict accused of murdering a yuppie lawyer.

8.   Your mystery may even have a twist.

9.   The mystery had puzzled authorities for weeks.

10.   The mystery has rivals curious about the four-time Olympic champion.