* Adding Proofs And Types book check_urls=free-programming-books-subjects.md
* Update authors name check_urls=free-programming-books-subjects.md
* delete the book in the wrong category
@ -559,6 +559,7 @@ Books that cover a specific programming language can be found in the [BY PROGRAM
* [Probability and Statistics Cookbook](http://statistics.zone)
* [Probability and Statistics Cookbook](http://statistics.zone)
* [Probability and Statistics EBook](http://wiki.stat.ucla.edu/socr/index.php/Probability_and_statistics_EBook)
* [Probability and Statistics EBook](http://wiki.stat.ucla.edu/socr/index.php/Probability_and_statistics_EBook)
* [Probability: Lectures and Labs](https://www.markhuberdatascience.org/probability-textbook) - Mark Huber
* [Probability: Lectures and Labs](https://www.markhuberdatascience.org/probability-textbook) - Mark Huber
* [Proofs and Types](https://www.paultaylor.eu/stable/Proofs+Types) - Jean-Yves Girard, Yves Lafont, Paul Taylor
* [Recreations in Math](http://djm.cc/library/Recreations_in_Mathematics_Licks_edited.pdf) - H. E. Licks (PDF)
* [Recreations in Math](http://djm.cc/library/Recreations_in_Mathematics_Licks_edited.pdf) - H. E. Licks (PDF)
* [Sage for Undergraduates](http://www.gregorybard.com/books.html) - Gregory Bard
* [Sage for Undergraduates](http://www.gregorybard.com/books.html) - Gregory Bard
* [Second Course in Algebra](http://djm.cc/library/Second_Algebra_Hawkes_Luby_Touton_edited.pdf) - Herbert E. Hawkes, William A. Luby, Frank C. Touton (PDF)
* [Second Course in Algebra](http://djm.cc/library/Second_Algebra_Hawkes_Luby_Touton_edited.pdf) - Herbert E. Hawkes, William A. Luby, Frank C. Touton (PDF)