Why get an ereader when you can use an inexpensive music player to listen to your files and keep your eyes rested. It is also safer to carry a portable music player than a bulky ereader. The program you use may be different, so that is why I did not include deeper explanation. Should all be point and click.
Note: I am not condoning any particular music player. you should decide that for your self. This instructable may require the use of an internet search engine. It is also beyond the scope of this instructable on how to do that. Beginning computer users may want to get help with how to find and install software on an MSWindows computer.
Step 1: Get the pdf to text software.
Find, download, and install PDF Ripper. Use this software at your own risk. There are several programs to do this, but this is the first one I found.