Books are heavy as shit though. If I take two similarly-sized boxes and fill one of them with books, and the other one with random stuff, the box with the books

Books are heavy as shit though. If I take two similarly-sized boxes and fill one of them with books, and the other one with random stuff, the box with the books is going to be the heavier one. Pretty sure the densest box that I had in my last move was the one where I had all of my books.