alt Hacker News> types and typing
This would be like asking for a book on designing grammar. It's just too disjoint of a field to have any kind of reasonable baseline, and it's drop dead easy to grok a basic one together. With those two things being equal, just like with grammar, the answer to this is any resource about implementing the language you're trying to ape.
It's drop dead easy to grok a basic one together until you get to hairy stuff like overloading, lambdas and generics.
The reasonable baseline would be something like Java 1. Scalars, arrays and classes. If I remember correctly, Lox even skips arrays as an exercise for the user.