A great new book on data science is out. The authors are the experts of Booz Allen Hamilton - a name that does need an introduction. The book covers in detail the definition and the basics of data science, provides insight on many topics and reveals some processes employed in the company. I like that it is very practical through the examples and guidelines for solving specific problems of many sorts a data scientist faces. It really is a field guide and helpful companion in contrast to some academical writing. And the best is that is free. Read more and download it here.