Is there any new information in the new book that has not already been presented in the existing books?
Yes. There’s almost nothing that is in the new book that is in the other books. There are things that are mentioned in the books and greatly expanded and they contain a great deal of information that is nowhere in the novels.
If you are viewing this on github.io, you can see that this site is open source. Please do not try to improve this page. It is auto-generated by a python script. If you have suggestions for improvements, please start a discussion on the github repo or the Discord.