I am an avid book reader, and also enjoy having a snack while reading. As one thing leads to another, food and drink gets on my books, and can ruin the book or book cover.
I also make lots of things from duct tape. So I found a solution to my problem through duct tape.
Literally all you need is:
A roll of Duct tape (I used several different types for some good color, but you can find a roll for a dollar.)
A book to make a cover for
A knife or something relatively sharp (AND SAFE)
Since you are using a knife, if you are under 18 ask your parents before using a knife.