I picked up a review copy (review forthcoming) of O'Reilly's new Information Architecture for the World Wide Web, 3rd edition, and so far it is a simply inspiring book. I'm only fifty-ish into its almost 500 pages but I've already started to brainstorm ideas for a huge improvement to the website at work, which I intend starting shortly after the holidays. Of all of the tech books I've read this is so far one of the best from a general knowledge point of view - the lessons to be learned in this book aren't just for web development, they're for anyone creating any sort of software. While I'm far from finishing it I already would have to count it as a must-read for anyone developing websites, both internal and public-facing, you won't be disappointed!