eg. 'python for programmers' would not need the first half of it dedicated to explaining strings, loops etc. and could get straight into it from a programmers perspective - a bit like K&R. You could then dedicate more content to explaining philosophy, design decisions, internals, history, politics (learn all the in-jokes ;)), etc.
this would also be a good format to learn new paradigms, eg. 'functional programming in scheme, for programmers'