Eucalyptus costs $9.99 in the App Store, and you can easily see the amount of polish and work put into it. It has become my favorite book reader instantly. And because of its huge library, you’ll always find a book to read. However, it is very expensive compared to other readers, but in some of those, you have to pay for books, or you only get a few. Anyone looking to read classic books on the iPhone must at least check out Eucalyptus. I might even say it is one of the most polished apps in the App Store.