Popular graded readers

And speaking of extensive reading, our department has recently been given a bit of money to expand our catalogue of graded readers, so I asked the library to get me the circulation data on our existing books. Although we have a variety of titles, the top 20 were almost all from the Oxford Bookworms series, and most of them were classics. Here are the top 10 (from most popular to least)

Oliver Twist Dickens, Charles
Sense and sensibility Austen, Jane
Tess of the D'ubervilles Hardy, Thomas
Far from the Madding crowd Hardy, Thomas
Great expectations Dickens, Charles
Wuthering heights Bronte, Emily
Ring, The Smith, Bernard
David Copperfield Dickens, Charles
Little women Alcott, Louisa
Three men in a boat Jerome, Jerome

Of these, only The Ring is not from OUP (it's a Penguin title). The other two in the top 20 that are not OUP are The Client, also Penguin, and Help! from Cambridge.

Anybody care to share their students (or their own) favorites?