Small spelling/grammar
Section 1.2.3 (page 23):
"Big data and tech companies carefully record your activities online, so that they can profile your preferences in order to provide better services."

Big data is not an entity but just a term (as far as I know), hence the sentence does not seem to make sense.

Edit:
I found a number of pieces that make the text flow less nicely. I will be working on a pull request to fix this.

Edit 2:
#112 