Same here, I'd like to understand a bit more about your background. Also, is the book specific to the web attack only or does it look at the whole environment

Same here, I'd like to understand a bit more about your background. Also, is the book specific to the web attack only or does it look at the whole environment (ssh, keys in the git repos etc...?)? Is it focussed on js only, or holes in other language/framework as well? Thanks.