As a PhD student in human-computer interaction, I have bought and read a lot of HCI books - and this one, I definitively should not have.Not only is the printing very, very bad (is seems as if somebody faxed some papers to a publisher who scanned the faxes and printed them), the book is also not organised (making it - from my perspective, as somebody with a background in physics and cognitive psychology - impossible to detect meaning, neither in the division of the book into parts, nor in the sequence of papers), and the choice of papers is (in my opinion, after leafing through it for at least five times, reading some of the abstracts and all of the contributers' appended CVs), rather dubious.The introduction is so badly written and typeset - it should have been a warning sign for me.My advice: Download and print those papers (if you really do encounter them some other place than in this book), and most certainly don't pay over $80.