The real classic to get is a book entitled, "Why not load your own! Basic handloading for everyone"
by Col. Townsend Whelen
First published in 1949 or so, which was right after WW2, it was the book that really started the hobby of home reloading. At that time, it mostly related to surplus war materials, but lots of other subjects are included in the book, including casting bullets. He was a good friend of Elmer Keith, the godfather of cast bullets.
So, if you are building a reloading library of classics, that is one to add.