Here's the author's introduction:
The idea came to me (as all good ideas do) in the shower. I'm taking text from out-of-copyright books, putting it on a "page" and "drawing" all over it, making fun of the words or just drawing funny doodles. I'm still developing the life and personality of the scribbler, so even though you'll never see a character, you'll probably see writing about some recurring characters too.
Anyway, check it out at http://oldredpen.com.
I'll be updating on Tuesdays and Thursdays for now, so now you'll have something to read on the days that xkcd takes off. ;)