The right device can make it easy to read mobile e books. There are several popular ereaders available, and with the right device, you can carry your entire library when you travel. Some ereader designs include 3G internet access, which allows you to download and read mobile e books from virtually any location. Others require a wi-fi connection for downloading new reading material. Nearly every ereader platform makes a wide variety of inexpensive and free materials available, so you'll always have something to read when you travel.