The creative common license is a great thing. It gives content creators the ability to offer their products under internet friendly terms. One such book that uses the creative commons license is Cory Doctorow’s book, Little Brother.
Although the book is targeted at ‘young adults’, the book is a good read for anyone in this post-Snowden world.
It focuses on the main character and his friends who wrongly get accused of being involved in a terrorist attack and what evolves as a result of that. It mixes fiction with the technological capabilities of spy agencies like the NSA, that we know exist.
The book can be found for free or for purchase here: http://craphound.com/littlebrother/ (The red bar at the top contains links to where you can buy the book in hard or audio form, and the bar also contains a link for downloading for free, which is possible due to the nature of creative commons)