contributed new reference books

[cheta-nyadav]

What does this PR do?

Add new resource(s)

For resources

Description

New reference books added.

Why is this valuable (or not)?

Added new helpful reference books.

How do we know it's really free?

With increasing interest of people in programming, these books can be really helpful.

For book lists, is it a book? For course lists, is it a course? etc.

These are free books, PDF/ ebooks

Checklist:

• [x ] Read our contributing guidelines.
• [x ] Search for duplicates.
• [x ] Include author(s) and platform where appropriate.
• [x ] Put lists in alphabetical order, correct spacing.
• [x ] Add needed indications (PDF, access notes, under construction).
• [ x] Used an informative name for this pull request.

Follow-up

• Check the status of GitHub Actions and resolve any reported warnings!

[github-actions]

Linter failed, fix the error(s):

free-programming-books/books/free-programming-books-langs.md
515:1-555:190  warning  Alphabetical ordering: swap l.550 and l.549  alphabetize-lists  remark-lint

[cheta-nyadav]

@greut @Andrea can you help me with the error? I followed all guidelines and some checks are failed, i dont get them.
Thanks

[eshellman]

This appears not to be an authorized distribution. Please see docs/CONTRIBUTING.md guidelines.