There are probably as many ways to create a Book of Shadows as there are Pagans out there. Most don't even call it a book of shadows, but for the purposes of clarity, I'll call them that here (what you call them is entirely up to you).
Here I will provide a list of a few different types of Books of Shadows that can be made, and are not as difficult as you think. Please enjoy:
Midori/Faux-dori Style Book
Hardbound Book
Screw-post/Chicago Screw bound book