Cheap eBook Store ?

I recently signed up to a site called Harlequin Teen Panel that sends me free books to my house as long as I review them for them. So I was wondering if anyone knew any other sites like this, I’d prefer it if they send me books rather then have them online or email. Thanks in advance!
hey anna could you post a website please?

First Look I use. They send you books if you review them. It is a really good program