TL;DR: Christian Rudder leverages the massive amount of data generated by his company, OKCupid, to draw wider conclusions and speculations about what Big Data tells us about what people really want (which is not necessarily the same as what they SAY they want).

For a while in the earlier days of OKCupid, Rudder published a series of fascinating blogs looking at different aspects of the data and drawing out all sorts of information, from what type of photos are found most attractive to what age preferences different genders have to racial attitudes based on profile descriptions and messages and lots more. These were entertaining and fascinating reads. The book is along the same lines although with updated data, but the topics and conclusions are basically the same and I was disappointed to find that if you'd followed his old blogs reasonably closely, there wasn't a lot new in the book. If you did NOT read the old blogs however you'll probably find a lot of interesting data here, presented in an easy to absorb way that does not require any kind of expertise in statistics or data analysis.

The various chapters are little snapshots of different aspects of humanity's collective psyche, revealing what we really want even when we don't necessarily admit it - or sometimes even know it. Some of the conclusions are depressing, some surprising, and all interesting. A note: this is best read in actual printed form (ie, not as an audiobook) due to the large number of charts and graphs.