You need 2 phonebooks. I didn't have any so I used dictionary's.
Step 1: Intertwining
First you need to intertwine the pages by have a couple pages from one book and then another book. Like the photo above.
Step 2: Pull
Now you pull. No matter how hard you try it won't pull apart. Unless you didn't do it right. The way it works is that you have the friction of multiple pages. It has the friction of one page times the number of pages that contact each other.