Information Architecture, 2nd edition.
Yesterday I read this book online, my first pic from the Safari service at O'Reilly. My first month at Safari will cost $15 for 10 books. Information Architecture retails for $28 at Amazon. Such a deal. While it may not spread beyond the technical sphere, Safari fits my needs for computer books like eLearning is practical for IT skills training.
The book gave me the final nudge into accepting that the new Internet Time site will separate form and substance. I've begun defining new .class items for CSS, e.g. "highlight" and "summary" and other elements to add clarity and improve usability. I'm going to have the system put breadcrumbs atop each page for navigation. The plan is to do a lot of coding upfront and almost none as time marches on. I bet this eliminates 10,000 font tags.