I'm not personally aware of a single good book on the subject, I'm sure there are some.
No such thing as seasoning. Poppycock, horse manure and fairy tales. If you're cleaning your barrel well, you'll remove any alleged seasoning.
A good fitting jag will grip an appropriate thickness patch both ways while swabbing your barrel. If you lose it, that's what a worm is for.
A lot of guys just use water, I use hot tap water with a few drops of Dawn. If you use boiling hot water you'll get flash rust. I put the bottom of my barrel in a container of water and using a bore mop just pump the water up and through the barrel. Repeat with a clean water rinse, remove the residual water (I use WD-40 and follow-up with an alcohol patch) then oil it. Before firing I use an alcohol soaked patch to remove the oil. I also dismount the lock and clean it, and spray with WD to remove the water. Total time to clean is about 15 minutes. Same procedure for both my cap and flint TCs.
Before I leave the range, I'll run a bore brush a couple of times to remove some of the fouling. If you do it will get stuck at the bottom, twist to the right a bit as the bristles wont reverse on their own and pull out. If you twist to the left, you'll just unscrew it. My thing and not necessary.
A few different ways to clean it but fancy solvents aren't required.
Since yours is a Kentucky I assume it's pinned, you don't want to dismount the barrel often, maybe once a year. If you have a removeable vent, you can get a flush nipple that you can screw in.
What caliber are you shooting?
Highly recommend you check out The Muzzleloading Forum. Lots of info and experience available and people ready to share it. It's ONLY for TRADITIONAL MUZZLELOADERS. Also black powder rifle accuracy system. The author is a fellow by the name of Dutch Schoultz who's on that forum under Dr5x. Well regarded in the community although his info is more about maximizing accuracy potential and not basic muzzleloading. When corresponding with him use caps and maybe even bold type as he's in his 90's and almost blind.
Just hanging around here, watching and asking you'll pick up a lot.
Keep your powder dry and make good smoke.