I have just recently gotten more into reading as an adult, and I have Harry Potter to thank for it. Don't judge me! I always read in middle school and high school, but as an adult I was more into TV and video games. However, I recently went on vacation, and pretty much all I did was relax by the pool in the sun. What a tough life!
I decided that my best bet was to download a bunch of different PDFs of books that I would like to read. I actually had the opportunity to finish the last Harry Potter book in the series, which was really exciting for me. I also downloaded a few other books that I was interested in, and it really is the best way to spend your time, especially since you can even read your iPhone when it is getting dark outside. The only thing that you have to watch out for is water splashing on it, or even a light rain or drizzle. As long as you keep your iPhone protected, then you are completely good to go. This is the best vacation tool for relaxing and recharging your battery! I highly recommend it.