Saw this on the CNET Cheapskate. As you know nothing is free, so to get this ebook at no charge, you'll have to give up some business information:
http://cs.tradepub.com/free-offer/windows-10-bible-free-ebook-a-32.99-value/w_wile220/
Quote from the Cheapskate:
Still learning your way around Windows 10? Need help with some of the techier aspects of the OS? TradePub is offering Wiley's "Windows 10 Bible" e-book for free in exchange for some info about your business. Valued at $32.99, the 888-page (!) guide aims to help beginners and power users alike. The book is provided as a DRM-free PDF.

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