I came across this application on Amazon.com today. It offers 38,000 free public domain eBooks, all organized within a table of contents directory. From the screen shots that the developers provided, it looks like you can either read the eBooks inside of the application, or you can download individual titles to your device in a variety of formats. All of the standard literary classics you would expect are there, plus many more lesser known titles.
The best part about this application is that it is currently free. One would normally expect some sort of fee for compiling the files and creating the TOC. This application would be great to have on your Android device. Instead of going to Project Gutenberg or ManyBooks and downloading individual eBooks (this can be very time consuming), you have every classic you could possibly want. The number of titles available through this app will provide readers with the opportunity to discover many classic eBooks they have never heard of before. This is why I love large classic eBook collections.
On eBay, there are a number of sellers offering tens of thousands of classic and public domain eBooks burned to DVDs. I have purchased a few of these sets over the years, and I can tell you they are always worth every penny. These sets usually cost between $5 and $10. Some might think they are getting ripped off because they are purchasing eBooks that are otherwise free, but remember, you are paying for the aggregation and organization of the files, not the published content within.