In February of this year, Packt Publishing offered "a free eBook every day" for 18 days. The offer is back again at https://www.packtpub.com/packt/offers/free-learning with the title Getting Started with C++ Audio Programming for Game Development being offered as I write this post (Kinect in Motion – Audio and Visual Tracking by Example was available free yesterday, the first day of this new offer).
The e-mail message I received from Packt about this new offer states, "It's back! And this time for good. Following on from the huge success of our Free Learning campaign, we've decided to open up our free library to you permanently, with better titles than ever." Unlike the offer in February that lasted for 18 days, it sounds like this one may be available indefinitely. The e-mail message further describes the offer, "Each eBook will only be free for 24 hours, so make sure you come back every day to grab your Free Learning fix!"
You need to create a Packt Publishing account if you don't already have one so that you can login to claim each day's free book. I have had an account for some time, but the most challenging part for me in the previous campaign was thinking of going to the site each day to see which free book was being offered.