the ansonia book is good. i have the fried book and understand that it's good but possibly a bit dated. penman's book is good, and good for referring back to.
unfortunately, i can't match your enthusiasm for korean clocks as i like beefy, solid quality... and that's not my impression of these clocks. check out this thread:
Changing Sehwa (Korean) 31 Day Mainsprings ... apparently their long mainsprings are difficult to work with, and their plates are thin and prone to bending.
my clock mentor told me early on i would figure out what i wanted to collect, and indeed i have. it started as 'anything with a pendulum', but then i learned about 'seconds' pendulums... a meter long, that tick every second... sixty times a minute, 30-tooth escape wheels, etc. i like those!

i got a bunch of seconds beating wall clocks (and they are big), and then some jewelers regulators.... and have now added some banjo clocks, which are really worth appreciating (check out the foley book). all of my clocks are at least 100 years old and will last another 100 if taken care of. korean clocks? not a chance.
is there a reason you're not on the lookout for older, higher quality american / english / german clocks? a good fusee? a time only deadbeat regulator?
(just my opinions, and an explanation of why i have those opinions)