you see the area of the book that seems ripped and the mona lisa is behind it? I made a path using the pen tool to isolate that part of the book and put it on a new layer.
then after that I took the picture of the lady, scaled it down, and erased all the parts of the picture i didnt want in. I selected the main part of the cat and lady, hit select inverse, feathered it 15 pixels, and deleted the edges so it faded. Then i applied a texture of a cracked desert floor over her face, set it to overlay and the opacity to around %35. Then went into the colour balance played with some settings, then played with some level settings. Voila.
As far as changing the title of the book, you'll need to find a Da Vinci Code font, or find a similar one and play with some blending options to get it just right.
Thanks for the compliments guys.