There are a couple of other design ebooks worth a look:
Sacha Greif's Step By Step UI Design: http://sachagreif.com/ebook/
Nathan Barry's ebooks: http://nathanbarry.com/app-design-handbook/ http://nathanbarry.com/webapps/
If I can answer any questions, leave a comment here or send me an email: hello <at> bootstrappingdesign {dot} /com/