I could hardly find any literature on Sublime Text 4 online. Are there any books (print and / or PDF) on Sublime Text 4? What I could find is outdated. There are some Udemy video courses, most of it includes version 2 and 3. I know that this is helpful because it is still topical, but perhaps there is some up-to-date documentation.
Is there any current literature on Sublime Text 4, if yes, where, and in which language?
I am not aware of any printed book or PDF dedicated to Sublime Text 4.
Most Subllime Text 3 documentation is likely still valid. Completion system, theming engine and syntax engine got major updates, but besides some breaking changes with regards to how tab completions work, all changes are “just” extensions and improvements of existing behavior.
A community driven online documentation may be found at https://sublimetext.io/
Most sophisticated video tutorials can be found at https://www.youtube.com/odatnurd