This book gives a simple and methodical background to the use of math in DS. The author makes sure that there are no gaps in the introduction of math knowledge of the reader when explaining the algorithms. This book makes you appreciate the theories behind DS and ML.<br><br>The final chapter discloses the reality in the demand vs hype of DS skills, which is honest and valuable.<br><br>Few errors in the narrations which should be fixed in the next revision.