Close #333 PR: List with books about R programming language.

readme.md

@@ -182,7 +182,8 @@ If you want to create your own list, please read the [create list instructions](
 
 - [Free Programming Books](https://github.com/vhf/free-programming-books)
 - [Free Software Testing Books](https://github.com/ligurio/free-software-testing-books/blob/master/free-software-testing-books.md)
-- [GoBooks](https://github.com/dariubs/GoBooks)
+- [Go Books](https://github.com/dariubs/GoBooks)
+- [R Books](https://github.com/RomanTsegelskyi/rbooks)
 - [Mind Expanding Books](https://github.com/hackerkid/Mind-Expanding-Books)