I have found these two to be useful: > https://github.com/lsmod/proof-of-history-explained https://github.com/lsmod/proof-of-history-explained > https://www.s

I have found these two to be useful: > https://github.com/lsmod/proof-of-history-explained https://github.com/lsmod/proof-of-history-explained > https://www.shinobi-systems.com/primer.html https://www.shinobi-systems.com/primer.html > https://www.youtube.com/watch?v=rKGhbC6Uync https://www.youtube.com/watch?v=rKGhbC6Uync (I know I know it's an hour long, but honestly watching 3 geeks having a good natured session contrasting their systems in real time is a joy)