Hey, is there a book people would recommend that isn't android focuses but more general/server side usage of kotlin?

Are you looking for some domain-specific book? Because for example Kotlin in Action is completely general and don’t have any Android specific parts

Yeah that would probably be a good option. That or the big nerd ranch one I'm looking at

Programming Kotlin over at Pragmatic Programmers is also generic. Currently in EAP, but almost complete. https://pragprog.com/book/vskotlin/programming-kotlin