Guillermo del Torro Fun Fact
 

So I was just watching the Hellboy disc and I noticed that the map in the book that Ilsa is using to navigate the ice maze, to wake up Grigori, is in fact Pan's Labyrinth.
I don't know if anyone has posted this before or if it's mentioned on any of the numerous commentaries, but I thought it was fucking cool.

Pics?

Just looked at the scene you mentioned and the book is the Diary of Grigory Rasputin. I don't think you see the title or anything too clearly, but if you have the Director's Cut DVD, some excerpts from the diary are included in the accompanying booklet and the pages that the character is looking at correspond to some included.