For years I was a notorious page corner folder. I’d mark corners of passages I needed for research with a fold, making bibliophiles cringe and scream. I thought books should look used: it’s a sign of love that a book traveled, got scuffed up, filled with post-it notes or coffee stains. I love when readers post photos of my books that have lived good lives.
But then, I love books and want them to last. It’s really not nice to mark up books that aren’t yours (but are owned by friends or libraries). If I had a better way I’d have used it, I just didn’t know of one. So when I showed my brother-in-law a particular good book (with my folds on every other page) his eyes lit up. That Christmas I was gifted a set of book darts.
Book darts are small arrow shaped strips of metal that you can place on pages to mark a passage. They are easy to use, easy to remove, and do zero damage to books. It’s a great paper clip-esque design: minimal and clever.
I use these things so much in my research that I own several hundred of them (I’m faster at marking pages than I am at reviewing the marks later).