As much as I love paper books, you have to admit that eBooks 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 eBooks aren't true anymore. For example, you don't have to buy brand new books for your eReader, you can check out eBooks 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 eBooks and audiobooks. You can use its site to find the titles you want and fill up your eReader for free.