“A Primer on Memory Consistency and Cache Coherence” is part of the "Synthesis Lectures on Computer Architecture" which are 50-100 page booklets on topics related to HW components. All the booklet PDF's are available online [1].

edit: only those PDF's with a checkmark are available as PDF to download, the rest can be bought. Quite a few actually available for download.

[1] https://www.morganclaypool.com/toc/cac/1/1