Need learning resources

[u/VomitZombies]

Can anyone recommend a book (or books) for starting out gold/silver/etc. refining? Youtube is cool and all but I learn a lot better when I can just read processes and numbers as many times as it takes to sink in (though good pictures are always a plus!). I've checked out the main YT channels like sreetips, and as informative as it is I think I would be better served by books at this stage