[maxloh]

I think I saw this template before. What software did you use to create the book?

[sb8244]

Pragmatic has an inhouse book compiler. Most authors write in markdown and there's some special XML features you can use as well for it. Of course code linking is a first class feature.

It's a pretty nice system, actually.

[ozornin]

Exactly. I wrote in (flavored) Markdown with occasional XML inserts.