In the spirit of all good things coming to an end, today is the last day you'll get six free months of mental_floss magazine when you pre-order The Mental Floss History of the World from Amazon.

If you already subscribe to the magazine, Amazon will just add six free months to your current subscription. Or you can even give the free subscription to a friend. Think of the holiday shopping implications!

So, click here to preorder your copy and get your free subscription today. (But only today!)

For more details, check out our FAQ.