Ive tried a few free eReader apps, and theyre always terrible. Id prefer PDFs to those stupid apps. Not this one. This one is worth the $5 I paid. I immediately know how to use all of the features just by looking at it, it has beautiful Google Chrome-style tabs, it has an interface that gets out of your way, the full-screen reading mode is gorgeous, the sidebar shows the ToC (not individual pages). Its just great! Im gonna go read now.