Add ML item to resolve #6319 (#6601)

* new branch for misc cleanup

* add item to resolve #6319

books/free-programming-books-subjects.md

@@ -2,6 +2,7 @@
 
 This list, organized by subject, is for books that cover a programming-related subject in a programming-language agnostic way.  
 Books that cover a specific programming language can be found in the  [BY PROGRAMMING LANGUAGE file](free-programming-books-langs.md) list.
+Books that cover a specific programming language can be found in the  [BY PROGRAMMING LANGUAGE](free-programming-books-langs.md) list.
 
 
 ### Index
@@ -352,6 +353,7 @@ Books that cover a specific programming language can be found in the  [BY PROGRA
 * [Mathematics for Machine Learning](https://gwthomas.github.io/docs/math4ml.pdf) - Garrett Thomas (PDF)
 * [Mathematics for Machine Learning](https://mml-book.github.io) - Marc Peter Deisenroth, A Aldo Faisal, and Cheng Soon Ong
 * [Neural Networks and Deep Learning](http://neuralnetworksanddeeplearning.com)
+* [Practitioners guide to MLOps](https://services.google.com/fh/files/misc/practitioners_guide_to_mlops_whitepaper.pdf) - Khalid Samala, Jarek Kazmierczak, Donna Schut (PDF)
 * [Probabilistic Models in the Study of Language](http://idiom.ucsd.edu/~rlevy/pmsl_textbook/text.html) (Draft, with R code)
 * [Python Machine Learning Projects](https://www.digitalocean.com/community/books/python-machine-learning-projects-a-digitalocean-ebook) - Lisa Tagliaferri, Brian Boucheron, Michelle Morales, Ellie Birkbeck, Alvin Wan (PDF, EPUB, Kindle)
 * [Reinforcement Learning: An Introduction](http://incompleteideas.net/book/RLbook2020.pdf) - Richard S. Sutton, Andrew G. Barto (PDF)