Today is the thirty-fifth anniversary of J. R. R. Tolkien's death.
Since The Hobbit was first published in 1937, it has sold over 100,000,000 copies. The Lord of the Rings has sold more than 150,000,000 copies since 1954. Together they have sold more copies than any other work of fiction.
Thanks to Joseph Bongiorno for the link and also reminding me of the significance that today holds.