I shudder for these poor mistreated books

Take a look at this "shelf of unfinished books" that I found HERE.  How many do you see?  Oooh, I could never do that to my books.  Doesn't that person have any bookmarks?  Or even a scrap of paper to mark the place where they quit reading?  With their spines cracked like that, I would bet those books feel worse than an old lady with arthritis in her spine.