A lot of the Old Testament this. Any translation that uses more readable language is nice. The King James version etc get too much credit for sounding religiousy.
Genesis through Deuteronomy or so are what a lot of Protestant churches at least focus on. The New Testament is Jesus’ life and then a bunch of letters to various early churches about how the Religion should work.
A lot of “the rest” are the kind of fables they’re talking about. Ruth, Esther, Job, Samuel, etc. The ones named after people/mythological figures, depending on your point of view/beliefs.
I bought a PiZero and set it up as a redundant pihole for this reason. It’s slower because it’s wireless, but not super noticeable since it’s ‘just’ DNS. I have the router pointed at the main and backup all the time and if I need to do something (or break the main one messing with dockers) there’s still the backup until I get the main up.
I messed around with some High Availability configs where they both had the ‘same’ ip but could never get it working smoothly. I just use the teleporter functionality within pihole any time I update anything to keep them in sync, which is rare.