Here is the email I send to my readers:
Hi, thanks for being reader of my Practical Git and GitHub book. I just released a new version which contains a large number of content and images fixes.
This version is very similar to the previous release, but I'm planning to make big changes in the next months.
I'm going to add a number of new chapters and remove content that might be better in a different book.
I really would like your feedback, so please don't hesitate to contact me at firstname.lastname@example.org or directly at the GitHub repo that contains all content and current Issues: https://github.com/DinisCruz/Book_Practical_Git/issues