So here's the thing: the internet is full of tutorials about specific implementations, but what you really want is the core concepts. You want to master (or at

So here's the thing: the internet is full of tutorials about specific implementations, but what you really want is the core concepts. You want to master (or at least understand at a basic level) the core concept so that you can then adopt any technologies. In that regard, my best find was "LDAP for rocket scientists" -- https://www.zytrax.com/books/ldap/ https://www.zytrax.com/books/ldap/ . It's long and boring, but immensely worth it. I didn't really understand the why of LDAP until I read that guide.