There is no such thing as a free lunch; there is such a thing as a free ebook. About 2 million ebooks are available free, for you to download and read.
This extraordinary resource is Chapter 3 from my book 50 Benefits of Ebooks: A Thinking Person's Guide to the Digital Reading Revolution. That book is updated twice yearly, in March and September. This page of free ebooks will be updated every January and June.
Zorba's Guide to Free Ebooks
http://www.zorba.us/?page_id=818
Be careful before downloading a free ebook, or before downloading anything: be sure that the ebook comes from a trusted and malware-free source.