Behold, the 10 Most Checked-Out Books in N.Y. Public Library History

To celebrate its 125th anniversary (which happens to be this year), the New York Public Library crunched the numbers to determine which are its most checked-out books of all time. How? According to the NYPL, "A team of experts from the Library carefully evaluated a series of key factors to determine the most borrowed books, including historic checkout and circulation data (for all formats, including e-books), overall trends, current events, popularity, length of time in print, and presence in the Library catalog." Isn't data fun? Check out the top ten below to see how many you've read.