I would go with post #5 - is about no "one" book that I found that has everything. I tend to start with the manual by the bullet maker or the powder maker - after some time at it, you will discover published mistakes - look up Nosler on-line or Nosler #9 book - 7mm STW, H1000 powder and note how they list identical loadings for both their 160 grain and 175 grain bullets - their listed Start load for 175 grain is now higher then their Maximum load in multiple previous editions of their manuals - so I no longer trust any "one" source for loading data - I want to see similar from several sources.
I also tend to be "that guy" that actually reads and keeps the little pamphlets that come with many reloading tools - because you know how to set up RCBS dies does not necessarily mean that you know how to set up Lee Dead Length seating die - and so on - is many little surprises like that!!
Most reloading manuals - about the first 1/4 or 1/3 of it or so, cover "how to reload" - often with an associated brand's equipment. I have about 6 manuals within arm's reach now - and probably double or triple that many older ones. Also, books by John Barnsess covered the process well and have some neat ideas how to "make do" instead of buying more stuff. Is also about a 36" tall stack of Handloader magazine and Rifle magazine - many tips and tricks picked up in them (is also much advertising and other B.S. in them as well!!).
And, I made or saw about any mistake possible over 40 plus years of doing it - as I mentioned to a young fellow, recently - you have not "lived" until you get chintzy with resizing case lube, then rip the rim off a case with the case body stuck in the re-sizing die - several makers sell "kits" that you can buy to resolve that without wrecking the die, or you can use normal shop tools and do the same for yourself - need to do that once every so many decades, and you will seldom forget that lubing step!!!
Like most things - start with a mentor or a book - most any reputable loading manual will help you to start - then try to cross reference any data to some other source - then try it, and gain your own experience. At some point you may end up with multiple manuals, maybe some scars, maybe some tools or "good deals" that you have not actually used in 25 years, or you might be the guy that has used the same recipe for his 30-06 since 1985, and that is the only "hand loading" that he has ever done. Learn what is "annealing". Try not to confuse your store-bought production rifle with a high precision custom bench-rest rifle - if you can not show a difference on target, whatever was sold to you as latest and greatest might not be so useful to you - so plan to start by making rounds that go "bang" and generally get a hole on paper where you are aiming. Progress from that.
And it will not quit with the reloading - sometimes your disappointing results get tracked down to a tight spot in the barrel channel pressing against the barrel, or the action bedding has created an arch in your receiver when the action screws torqued up, or a scope mount screw that has stripped or partially stripped and is no longer holding the base or rings tight to the receiver, or the scope has died - and so on - is not always the ammo that is at fault. And, dread the inevitable day that you discover that the "nutz" behind the trigger has something to do with the group size!!!