Cybersecurity Canon
cybercanon.paloaltonetworks.com
cybercanon.paloaltonetworks.com
It seems to be a mixed bag of technical, historical reference, and some inspirational/fiction material (e.g. Neuromancer).
So, I came across this site while I was skimming through a Palo Alto study guide to their PCCSA[0]. I had found it neat that they published materials for certificate students for free, and so I continued searching their site for more PDFs.
(quick note: certificate merit has been debated many times on HN[1])
After coming across another guide PA had composed for management-level decisionmakers[2] I found this site through a series of links.
One of the books from this list that I really like is Security Engineering. I found it odd that they don't have it categorized under any of their technical filters. They do give a brief overview of their reasoning for listing it here[3].
[0]: https://www.paloaltonetworks.com/content/dam/pan/en_US/asset...
[1]: https://news.ycombinator.com/item?id=14098466
[2]: https://media.paloaltonetworks.com/lp/eu-regulation/assets/C...
[3]: https://blog.paloaltonetworks.com/2019/09/cyber-canon-book-r...