Digital Economy Fact Book - Tenth Edition

Where do you go for good research and data about the internet?  Do you need to know about the number of users online, the number of websites, trends in social media?

"The Digital Economy Fact Book" is a great resource.  Now in its 10th edition it is rich with charts, graphs, and facts.  All organized into interesting chapters.  What makes this book quite a gem though is the thorough reference and citations.  A fantastic starting point to follow up and find the latest details and updates from the original sources.

A great find and book to keep on your digital bookshelf.