Dom's book was available in ebub format from the beginning, I read the early drafts in epub.
Note hat the book is not needed to learn Nim, there are many great resources for beginners now: [https://nim-lang.org/learn.html](https://nim-lang.org/learn.html) The book is a nice to have, for some special examples like writing a twitter clone. From time to time Manning offers the electronic release for only 20 $, if you buy that you get epub and PDF. Mirans tutorial is available as PDF and HTML, it is based on Asciidoctor, maybe you can generate epub yourself. For update of "Nim in Action": The book should be compatible with Nim 1.0, there are only some minimal inconsistencies, like in old Nim strings and seqs could be nil. No serious reason not to buy the book.
