Free Field Guide to Data Science

Very nicely done, 126 page, free and shareable introduction to Data Science by Booz Allen Hamilton.  Starts very simply, fine for an executive intro.  Takes you much further, but never gets very technical.   Lots of useful practical hints and advice.  Many visuals, a bit overdone, but those that are meant to be are very informative.   Attention is paid to the embedded business decision aspects of results.   Also covers the team aspects of doing data science.  Worth scanning or reading.