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 the Blogosphere -- BlogIntelligence Portal -- DAta Extraction -- Data Analysis -- Data Visualization -- The Secret Depths of the Blogosphere -- Analyzing and Forecasting Trends -- Judging Consistency and Expertise of Blogs -- Expected Growth and Future Structure -- Future Influence and Usage Patterns -- Vision of Analysis and Monitoring -- Bibliography.