I'm not sure that this hasn't been posted before, but couldn't find it in a search.
Basically, you can get a free 30 day trial from Scribd and that means you can download as many ebooks and read them as you wish from their pretty extensive range of titles.
I like the way it works and have the trial. I'm considering taking on the package afterwards as it's not too pricey.
Worth checking out if you love your ebooks.
Might be worth noting the following
So you will probably need your credit card and a calendar program to remind you when to cancel.
No biggie but worth being aware of.