Secrets are not what they used to be. The nation’s greatest storyteller has made us wait 100 years to find out what was in his heart, but LeBron James spilled the beans on a TV special after only weeks of teasing our interest in an era when everyone from Elizabeth Edwards to Levi Johnston is sharing.

Isn’t it better this way? Mark Twain’s reticence recalls that memorable Jack Nicholson line in another American classic, “You can’t handle the truth.” But in the 21st century, we can not only handle but package and promote it in media that Mark Twain only vaguely foresaw.

Before his death in 1910, the creator of Tom Sawyer and Huck Finn instructed publishers of his memoirs that “all sound and sane expressions of opinion must be left out…There may be a market for that kind of wares a century from now. There is no hurry. Wait and see.”

A hundred years later, is there ever! In a time of 24/7 exposure, his unexpurgated truths will be competing on the best-seller lists with those of Chelsea Handler, author of “My Horizontal Life: A Collection of One-Night Stands” and an unforgettable sequel, “Chelsea Chelsea Bang Bang.”

There won’t be any carnal revelations in the three volumes of unvarnished Mark Twain, but advance word from the University of California Press suggests no shortage of relevance to our times.

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