Marie's Review On the surface, this book appears ridiculously simple, unless you’ve read Leading Change, also by John Kotter, and also realize that changing an organization is never simple. This is another easy to read book in the business fable genre that takes advantage of the appeal of a good, if light, story. The characters are the members of a penguin colony who slowly – some more slowly than others – come to realize that the iceberg that they call home is in danger and that they must find another. Someone who had not read Leading Change might miss the execution of each of the eight steps for leading a successful change effort. But those who have read that previous book will appreciate the complexity and importance of the issue that Kotter and Rathgeber have handed the penguins and will value seeing the execution of the eight steps.