I want to do invisible ink, but I don't know where to find any of it. or a small black light like dipper has.
Ah here we go. Mix 1 part lemon juice and 1 part water in a shallow bowl. Grab a cotton ball and dip the tip of it into the mixture. Get your paper and write a message using the cotton ball. Let dry completely so no moisture can be seen. If the secret message needs to be viewed, hold a lamp or light bulb underneath it.
What? No! Any light source underneath the paper will make the message show. You don't want to burn the paper, too.
Well, I guess you have a higher chance of making the book fit what happened in the show. ... burned... it will be burned...
BURN BABY BURN!!.... .... ....also I found this one which writes in in invisible ink with a lamp built in so you can read it. I think. I got it at a gadget store one day...