Every demonic hag needs a copy of the Necronomicon.  There really is no good alternative when conjuring demons and having any hope of controlling them.  So here is mine... or hers.  Admittedly it is a bit too glossy in the final pic, but I am thinking it will show better at night.  

 

Step 1)  Locate unwanted book and slather on liquid latex in the form of a Necronomicon face.  There are many out there, so no need to try to be exact.  I use a cheap silicone spatula since it allows for a bit of a sculpting effect rather than brushing, and the later dried latex easily peels off.  If possible, push in bits of previously dried scraps into the drying face to add a nasty textural element.  

 

Step 2) Paint on a diluted calligraphy ink to both tint the latex and have the ink pool in the recesses, giving good definition and gloss.  I used reds, a brown, and a black.

 

Step 3) Touch up with acrylic paint where needed and apply further diluted ink to get more warm tinting. 

 

 The finished product has a definite flesh texture, where it is pliable but otherwise firm.  The sheen from the inks makes the book appear to still be wet, as if recently made.  The bits that were added in have cause at least one tester to shiver and pull their hand away.  Not bad for roughly $1 in material costs (assuming you have the inks and paints already).