* add spark internal book

* change slideshare like to forked repository

* Update books/free-programming-books-th.md
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* update TOC

* change TOC title to group of content
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* trigger linter

* remove typo

* Ordering TOC

* re-arrange book section

* more specific document to Thai version
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>
Co-authored-by: NDavid Ordás <3125580+davorpa@users.noreply.github.com>

* added Go lang to courses-th.md

* hot fixed blank line

* change to book-th.md

* Change content to one book

* remove go in free-courses-th.md

* alphabetize added language courses

Our linter had not been looking at these languages

* fix books files

* casts and more

* reorganize files

1. make it easier to find files
2. reduce scrolling to get to README on main view of repo

* remove tr.txt again

Co-authored-by: NEric Hellman <eric@hellman.net>

* Add Thai e-book

* Add IoT E-Book.

* Corrected two lines  breaks

* Update free-programming-books-th.md

* Fixed order & Added more info

* Fixed format of entry

* Change book from C -> Java, for safer URL

* Try to fix grammar.

* Try to take-out "special char" from the name

* Fixed newline

* Add TH language books

* Add link on README.md