The Momentum Effect: How To Ignite Exceptional Growth
By Jean-Claude Larréché
Wharton School Publishing, £19.99, £29.99

The British, it is sometimes said by their exasperated French neighbours, are better at grasping facts than ideas. Jean-Claude Larréché’s new book may prove challenging for all Anglo-Saxon readers who struggle with the vision thing. He has written an extended hymn of praise to momentum, which, as an abstraction, is hard to measure. But, as the author shows, you know it when you see it.