Below are two links for free ebooks. Take your reading with you with Overdrive or ManyBooks.
Wisconsin Library Consortium - Overdrive
Using the WPLC Digital Books is easy! If you need help, here's a quick guided tour created by OverDrive, the company that provides downloadable service for us and many other libraries. The guide walks you through the basics, from getting started to downloading to burning to a CD. In just a few minutes, even the newest user can be enjoying a downloaded title.
ManyBooks - Browse through the most popular titles, recommendations, or recent reviews from our visitors. Perhaps you'll find something interesting in the special collections. There are 20,200 eBooks available here and they're all free!