Ask HN: Need a book recommendation

A friend of mine is a really good designer mostly for DTP and Layout. Usually we both work as a team. Me programming and he "designing" but he's moving.

I want to make him a gift, to motivate him learning programming. Not low level, but programming which is useful for designers like him. E.g. Scripting for DTP programs or writing macros or little tools (in ruby/python e.g.)

So I search a book for him to start.

Any ideas?

Thanks!