You can read about how Matheus cracked his CISSP exam here:
How Matheus Cracked His CISSP Exam
He also created his own mindmaps (old 10 domains), and gave me permission to share it on this website.
If you don’t trust the link or want to scan the files for free online (this is security after all), you can visit https://www.virustotal.com/ – This site will scan URLs or files.