10. Don't need external light 11. Always only take up the space of a very thin book no matter how many you bring I have a lot of sentimental feelings for my ph

10. Don't need external light 11. Always only take up the space of a very thin book no matter how many you bring I have a lot of sentimental feelings for my physical books, but they are just so inconvenient. Sadly, for this reason I only buy reference books in print. I even repurchase books I was gifted physically, as ebooks to actually read them.