While looking for a downloadable version of a book recently, I stumbled upon this site. What a massive list of sites for downloading material!
From their site… “Reading a book is fun, but when you forgot it at home, are bored at work or are just curious to get a sneak peek at whatever you ordered from Amazon, online book sites can be handy too. Below is a list of over 100 free (and legal) sites to find great literature for download.”
Disclaimer: I have not gone through all the links on this site….please use your discretion.