system-design-interview-notes or alex-xu-notes .
Many "top" engineers created Gists containing the Table of Contents and Summary of Key Points of Volume 2. Legally, a summary of a chapter is fair use. Search: site:gist.github.com "Alex Xu" "Volume 2" . system design interview alex xu volume 2 pdf github top
If you cannot afford Volume 2 ($40 on Amazon), use the GitHub "top" repos to get the summaries, then watch the free YouTube breakdowns (e.g., "Gaurav Sen" or "Jordan has no life") that explicitly reference Alex Xu’s Vol 2 chapters. system-design-interview-notes or alex-xu-notes