To my wife Claudia and my kids:

I hope, I did not drive you crazy when you had to wait for me again and again because I wanted to take these snapshots.

And, thank you for your patience during night-writing and other long sessions.

A special thank to our youngest daughter Eva, who helped me to decide which photos were worth to be included in this book.

I love you.

To you, my dear reader:

Thank you for interest in this book. I hope you enjoy this book.