Publisher’s acknowledgements

We are grateful to the following for permission to reproduce copyright material:


Figure 6.1 adapted from The Conversation Prism,, © Brian Solis, and JESS3; Figure 7.1 from LinkedIn; Figure 14.1 from bitly with permission from; Figures 14.2, 14.3, 14.4 from, Sprout Social; Figure 19.1 from, owner of the website content (excluding photo) is, Inc., photo with permission from Design House Stockholm.

In some instances we have been unable to trace the owners of copyright material, and we would appreciate any information that would enable us to do so.

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