Page numbering page). Even numbers usually appear on verso pages, while odd numbers appear on recto pages. In the printing industry, in cases where odd numbers appear on verso pages and even numbers on recto pages, this is referred to as "non-traditional folios" (in the past, it had been referred to as "Chinese folios", however this term has fallen out of favor in recent years). In books, some pages, known as "blind folios", of the front matter and back matter are numbered, but the numbers are not always printed on the pages. Publishers are not consistent about how they number the pages
Book censorship in the United States challenged because they are perceived by some to promote witchcraft and the occult. "Operation Dark Heart", a 2010 memoir by U.S. Army intelligence officer Lt. Col Anthony Shaffer, is notable for the lengths the U.S. Defense Department went to in an attempt to censor information that the book revealed, even after it had already been distributed free of changes. Both censored and original copies of the book are available in the public domain. As an author, John Green said, “Text is meaningless without context. What usually happens with Looking for Alaska is that a parent chooses one page of the