Measure the folds. They should be at least 1. 6 in (4 cm) in length. [4] X Research source

Try not to create new folds on top of preexisting folds in the paper. This will cause your book cover to tear more easily. [5] X Research source

Do not tape the paper cover to the actual cover of the book; the paper cover will move a little when the book opens, and you could damage the book cover. [8] X Research source