You can download
11/22/63 by Stephen King from just about any ebook retailer after you legally purchase it.
If what you're asking is where you can download copyrighted books for free
illegally, then yes, you are very much breaking a forum rule (and invariably copyright law if successful). What you should do is not ask for help pirating books at Mobileread.
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If that was indeed your intent, this will be the one and only warning you get about it. A permanent ban will result the next time.