Mathematical secission suggestion

books/free-programming-books-langs.md

@@ -1590,6 +1590,7 @@ Books on general-purpose programming that don't focus on a specific language are
 * [Stephen Wolfram's The Mathematica Book](http://reference.wolfram.com/legacy/v5_2/)
 * [Vector Math for 3d Computer Graphics](http://chortle.ccsu.edu/VectorLessons/index.html) (CC BY-NC)
 * [Wolfram Mathematica Product Training: Wolfram U](https://www.wolfram.com/wolfram-u/catalog/product-training/mathematica/)
+* [Practical Statistics](https://github.com/Chandra0505/Data-Science-Resources/blob/master/machine-learning/Practical%20Statistics%20for%20Data%20Scientists.pdf) -Andrew Bruce, Peter Bruce, and Peter Gedeck
 
 
 ### MATLAB