'Nim in Action' from Manning is well written and solid, I found recently. Nim is surprisingly robust, I'd mention. The book has a chapter on using Jester for a web framework. This is adequate for some things. If anyone is at the point of using Nim as a server for React clients, doing something beyond a hello world (interacting with forms), I would love some pointers. I haven't yet thought through what may be done with Nim's capability to compile Nim code to javascript in situations like this.