Have you read Les Liaisons Dangereuses by Pierre Choderlos de Laclos?

Now I found out the movie Cruel Intentions was based off a french book Les Liaisons Dangereuses by Pierre Choderlos de Laclos... Now if I go to the libary will the book be in french? Or will it be in english? And if anyone has read it, is it a good book? I loved the movie, so I wanted to try the book. Oh and how long is the book?