Introduction.- The Blogosphere.- Understanding the Blogosphere.- Micro- and Macro-Perspective.- Areas of the Blogosphere.- Introduction to Important Areas of the Blogosphere.- Docu-Blog Use Case: The It-Gipfelblog.- Edu-Blog Use Case: InternetWorking Blog and HPI MOOCs.- Marketing-Blog Use Case: SAP HANA Blog.- Ego-Blog Use Case: Heinz-Paul Bonn.- Corporate-Blog Use Case: SAP Blog.- The Explorer's Path through the Blogosphere.- Challenge of Exploring...