Book excerpt: Armed with custom software that scours the English-speaking world's new Internet blog posts every minute, hunting down the phrases "I feel" and "I am feeling, " the authors have collected over 12 million feelings since 2005, amassing an ever-growing database of human emotion that adds more than 10,000 new feelings a day. Equal parts pop culture and psychology, computer science and conceptual art, sociology and storytelling, this is no ordinary book -- with thousands of authors from all over the world sharing their uncensored emotions, it is a radical experiment in mass authorship, merging the online and offline worlds to create an indispensable handbook for anyone interested in what it's like to be human.