What's the best Local SEO Guide? (With PRO tricks and not outdated systems)

Hello,

i'm looking for a good local seo course or guide or book,

but not the tipical "use kw, add citations, ad links and reviews", i know the basic and i'm looking for advanced stuff

does exist any good course or GMB is so simple at it seems?
is the "advanced stuff" just automation apps?

i'm also affraid to pay for shit