Staffan Noteberg books

Die Pomodoro Technik In Der Praxis: Der Einfache Weg, Mehr In Kürzerer Zeit Zu Erledigen (2009)

This is the only book I've read on the Pomodoro Technique so far so I can't compare it to the more official documentation that I believe also exists, I'm going to check that out too.That said, I found this book to be an easy but instructive read. The eponymous illustrations don't really add a lot...