'Hidden Value' is an excellent guide to IP, written for and from the perspective of business people who need to know the answers to a comprehensive range of questions, from 'What should my company be doing about its IP?' to 'What are the major differences between Patent Law in different jurisdictions across the globe?' It manages to provide an unusual balance between user-friendliness (it is engagingly written, amusingly illustrated, and takes examples from intriguing and colourful business histories) with a tremendously high degree of accuracy on technical matters of the law. Most comparable books fall between these two stools. I particularly enjoyed the practical case studies at the end of the book -- especially the story of how Dow Chemical saved large sums of money by active, preemptive management of its patent portfolio. The style of the volume is unusually elegant and precise, making it a pleasure to read as well as extremely useful, and the editor, Richard Poynder, has done an excellent job in integrating the chapters by different experts in the field including himself. If your company has any form of IP at all (and who doesn't these days?), then you neglect the publication of this fascinating and factually reliable guide at your peril.