Recent 21++ The Undoing Project. Kahneman and tversky are psychology researchers who have long worked together and who helped to usher a new era where economics. A friendship that changed the world, by michael lewis, allen lane/ww norton, rrp25/$28.95, 368 pages. Tim harford's new book is 'messy: The undoing project is about the fascinating collaboration between two men who have the dimensions of great literary figures. The Undoing Project - Book Summary The Undoing Project Summary Michael Lewis News, author interviews, critics' picks and more.