2nd_Book_CS.md (#10497)

This book is the 2nd part of the book I updated earlier published by CBSE

books/free-programming-books-subjects.md

@@ -224,6 +224,7 @@ Books that cover a specific programming language can be found in the [BY PROGRAM
 * [A Data-Centric Introduction to Computing](https://dcic-world.org) - Kathi Fisler, Shriram Krishnamurthi, Benjamin S. Lerner, Joe Gibbs Politz (HTML)
 * [Computational Thinking](https://www.cs.cmu.edu/~15110-s13/Wing06-ct.pdf) - Jeannette Wing, Carnegie-Mellon University (PDF)
 * [Computer Science Class XI](https://cbseacademic.nic.in/web_material/doc/cs/1_Computer-Science-Python-Book-Class-XI.pdf) - CBSE (PDF)
+* [Computer Science Class XII](https://cbseacademic.nic.in/web_material/doc/cs/2_Computer_Science_Python_ClassXII.pdf) - CBSE (PDF)
 * [Computer Science I](https://cse.unl.edu/~cbourke/ComputerScienceOne.pdf) - Chris Bourke (PDF)
 * [Computer Science II](https://cse.unl.edu/~cbourke/ComputerScienceTwo.pdf) - Chris Bourke (PDF)
 * [CS Principles: Big Ideas in Programming](https://www.openbookproject.net/books/StudentCSP/) - Mark Guzdial, Barbara Ericson (HTML)