PacktPub, a well known but smaller publisher, provides a free eBook every day. I believe it is a loss leader that they run in an attempt to generate more sales. Each book is only available for free for one day. There is no obligation, beyond registering, when getting a copy of this book.
It can be found here: https://www.packtpub.com/packt/offers/free-learning
BTW I get nothing for posting this. Nor am I the author. I just hope that someone from this forum is interested enough to make my posting this worthwhile.
-- Stop your grinnin' and drop your linen...they're everywhere!!!