A review by raulmazilu
Everybody Lies: Big Data, New Data, and What the Internet Can Tell Us about Who We Really Are by Seth Stephens-Davidowitz

4.0

I enjoyed discovering 1/ the datasets he used and 2/ the findings from studies he cites. The main takeaway is that internet data (search data, most notably) can be used to learn about the preferences, thoughts and desires of groups of people with more accuracy than via traditional studies or questionnaires.

If you're in the data science field, some ideas won't be new to you (correlation vs causation, omitted variable bias, sampling issues).