As much as I love paper books, you have to admit that e-books are a bit more convenient to carry around. You can load your entire library on a single gadget, after all.
Even some of the past complaints about e-books aren't true anymore. For example, you don't have to buy brand new books for your e-reader, you can check out e-books from many libraries now.
You just have to know how to find them.
OverDrive is a company that works with publishers, libraries and schools to distribute e-books and audiobooks. You can use its site to find the titles you want and fill up your e-reader for free.