"...fascinating. Like Malcolm Gladwell on speed." "HERD is a rare thing: a book that transforms the reader's perception of how the world works". "This book is a must. Once you have read it you will understand why Mark Earls is regarded as a marketing guru." This paperback version of Mark Earls' groundbreaking...
--THE GUARDIAN
--Matthew D'Ancona, THE SPECTATOR
--Daniel Finkelstein, THE TIMES