Never force a book flat when photocopying or scanning. Forcing books flat can break bindings and tear pages.

Also, do not press down hard with the photocopier or scanner cover onto the book. Don't smash the binding onto the glass.

This is better. Allow the book to sit naturally on the copying or scanning surface. If necessary, it is ok to hold down lightly.

Pages can be loosened and eventually fall out as a result of pressing materials when photocopying or scanning.