Today my nearly free book (thanks to FFK09 and Addison-Wesley) arrived! Wolkenform recommended it.
Hope I can read it this weekend (the flu has me) and give you a glance about it.
UPDATE: haven’t read it completely so far, so complete resume* later. Until now: it gives a freelancer (that never worked in the development-department of a big company) a lot of insights into software-development.
* probably this resume will be german, because the book is german, too!