The second book (the SRE workbook) is more prescriptive, walks through practical ways of implementing it.
The most base description of SRE principles is simply that:
1) You automate aggressively and develop or use self-service tools as much as possible (over ops work)
2) you define what “availability” really means; institute an allowance of errors based on budget. Highly reliable systems should get much more attention and budget than lower requirement systems. Make an SLO dashboard; alert based on your “error budget” being eaten too quickly.
3) try to avoid allowing your staff to work more than 50% on operations work; that’s your indicator for being overloaded.
SRE Workbook (https://landing.google.com/sre/workbook/toc/): Chapters 1, 2, 5, 6, 8, 16, 17, 19, 20, 21, All the Appendixes
Disclaimer: I work for Google
https://www.usenix.org/conference/srecon14/technical-session...
I'm just looking for an easier way to communicate core principles and concepts to my team without asking them to sink into 500 pages?