A while ago I posted about the beta release of
www.retroread.com, a free service which allows you to convert Google epubs (public domain) and forward them to your Kindle. A few folks responded to my "registration key required" early beta.
The service has greatly expanded and evolved. All converted books are now available for free download (each time a book is converted, it's added to the library). Google Books Search is used to search the library of converted books, and this can be accessed directly from your Kindle. (The
www.retroread.com url is Kindle browser friendly.) So you can search and download directly from your Kindle -- all free.
Don't find the book you want in the library? Register and convert it yourself, which simply means downloading it from books.google.com and uploading it to retroread.com. It's not necessary (but nice) to send result to Kindle (Amazon will charge you $0.15 - $0.30), results can also be sent to your regular email address. Plus the converted book is added to the library where it becomes available to everyone.
It's "open beta" -- fairly stable and featureful, and still changing.
Enjoy.
www.retroread.com
David Eyes