Depressing books

I'm vlogging again and this is my first attempt at using the fancy cut scene style as favoured by half of YouTube. What do we really mean when we say a book or other piece of art is depressing? And when we do say it, why is it often meant as a negative thing? Watch on to find out what I reckon. If you're reading this via RSS or email, you can watch the video on YouTube right here. And wherever, you're watching, don't forget that you can subscribe to my YouTube channel and get updates whenever I upload something new. Imagine!