The authors would like to thank David Chappell for believing in the project from the very beginning and for hosting our book in his prestigious series. The deep discussions we had about identity and how to explain its nuances were invaluable in helping us communicate the most complex topics.

We would like to thank Kim Cameron for eliciting the dialog that led to the Laws, the Identity Metasystem, and ultimately Windows CardSpace. We could not have hoped for anybody more appropriate for writing the foreword.

Many thanks to the Addison-Wesley production staff, who steered, guided, and helped us with great professionalism and infinite patience: Joan Murray, Chris Zahn, Curt Johnson, Betsy Harris, and Emily Frey.

This book would have ...

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