Bookmateä book covers are a great way to protect/travel with your books. They have two sizes that fit all standard paperbacks and they come in a variety of colors and patterns. Bookmateä book covers hold your books open, so you don’t have too -- great for treadmills, sunbathing and more. I love mine!
(I am in no way affiliated with Bookmateä -- I just really, really love mine!)