With more than 2 billion copies of her books in print, British novelist Agatha Christie has kept countless readers up into the early morning hours.

MYSTERY
They were perfectly preserved down to their 1940s attire.
King Zog of Albania planned to recreate his court in a Long Island mansion—but he never even visited.
The origins of the “Isdal Woman” have been unknown for 46 years. Now, police have finally figured out where she's from.
After 27 years, a traffic accident victim can officially be laid to rest.
No one knows what happened to "The Beautiful Cigar Girl," although Poe was convinced he'd solved the mystery.
Perhaps even more puzzling than the meaning of their creation is how they were built in the first place.
Did Amelia Earhart, the famous aviator, crash into the ocean and die, or did she meet another fate?
Was there a body hiding in plain sight on a Liverpool street for 60 years?
The Moravian Book Shop in Bethlehem, Pennsylvania, has been around since 1745—and has picked up a resident ghost along the way.
From biological warfare to underground bunkers to "Blucifer" the horse, Denver's airport has generated a lot of mysterious buzz.
No one knows who the man in the suit on the beach was—or how he died.
All words had to start somewhere—but sometimes, after much searching and analyzing, no satisfying origin explanation can be found.
There was something strange happening on the island of Eilean Mor long before three lighthouse keepers disappeared in the winter of 1900.
Whether their crews disappeared or their captains went mad, these ghost ships still sail the seas (supposedly).
In 'The Great Detective,' author Zach Dundas reveals that the frenzy surrounding Sherlock Holmes isn’t strictly a Benedict Cumberbatch-related phenomenon. The master of Baker Street has always inspired fanatical devotion and feverish anticipation.
Was that mysterious "bloop" in the ocean made by a whale? Or by something much more mysterious? Investigators still don't know.
Kryptos, a set of huge copper plates with enciphered text carved into them, is an encrypted sculpture installed at CIA headquarters in Langley, Virginia. Although the sculpture was installed in 1990, it took until 1999 for someone to actually decrypt part
There’s actually a whole group of people who enjoy the theory that Sherlock Holmes – or at least sidekick John Watson -- was real. The truth? Well that's elementary, my dear Watson.