If your trying to get content for your Website for whatever purpose a great place to go is Project Gutenberg. Basically it’s a huge collection of ebooks that are now royalty free and availble for you to use. They have a huge array of subjects and you may find something applicable for your website and of course, you can spice it up with a little adsense

From the horses mouth:

“Project Gutenberg is the first and largest single collection of free electronic books, or eBooks. Michael Hart, founder of Project Gutenberg, invented eBooks in 1971 and continues to inspire the creation of eBooks and related technologies today.”