I technically started these manuals while I was studying for CAS 9 in 2017. At that time there were precious few affordable resources. This was quite important to me because my then job did not provide exam support.
The CAS 9 Manual is largely based on the notes I wrote up for myself while studying, with a good amount of refinements.
The other work followed mostly because I also like that material a lot.
Hopefully you will find the manuals useful, and if you see any opportunities for improvement, do let me know!