You can find them here, note you may need to click on the right to read the furthest right-hand side of the page. Here are excerpts from those blurbs:
Tim Harford: “His best, most ambitious and most personal work.”
Cardiff Garcia: “I think you’ll find that following the logic in Stubborn Attachments is as fun as it is intellectually provocative.”
Mason Hartman: “The book invites you to fight it.”
Cass Sunstein: “It’s a book for right now, and a book for all times. A magnificent achievement.”
Tomorrow is publication date for the book, you can order here, and here is some background on Stubborn Attachments: A Vision for a Society of Free, Prosperous, and Responsible Individuals.