Great inclusion. Why? Well it has to do with software developers who have highly developed skills with algorythms, numbers and language but abysmal visual, colour, drawing and graphic design skills. So any book that 1) makes them see they have missed out developing these skills and 2) the basics of how to start and recognise what is required is good.

I can only think of a handful of developers who are hackers, programmers and artists. Just like maths, writing and playing music it's just another form of literacy to be learn.

This is design as in graphic design, not software design. Just in case anyone else didn't realise from the title.