This book looks amazing and I'm certainly going to buy it. But I will say it is worth considering an e-book at some point for a couple of reasons:
1. the language and standard library will continue to evolve and bitrotting is a huge problem with tech books, even C/C++ are not immune and asking people to buy another paper edition at each iteration point will be a non-starter 2. there is historical precedent, the author of Shen, a very promising Lisp which is about the same age as Nim did the same thing and it was/is very detrimental to adoption which is a shame because it has some great ideas, just like Nim.
