Haha When I found out, there was an interview of Guillermo del Toro in the latest issue of the new yorker,I right away went to read it online. It has to be the most informative interview I have read of him, that I decided to run to the bookstore and get me a copy to add it to my library. Such a nerd .
If you are abig fan of his movies (like me )I highly recommend you to go read the article here:
Here's a cool video about his sketchbooks, which blew me away: