> But what happens when sales numbers don't meet projections? The book is discounted. Then, at the publisher's discretion, the bookstore will receive a directive to rip the covers off the books, recycle the remainder of the book to be "pulped" or turned into other forms of paper, such as notebook paper and toilet paper. The bookstore is expected to mail the book covers to the publisher as evidence that the book has been destroyed.

https://www.offthebeatenshelf.com/blog/pulp-fiction-is-real