Nowadays when we want to learn about something we head for our nearest search engine, then they direct us to somewhere like Wikipedia. Back in the day we relied on real encyclopedias that were written by teams of editors instead of anonymous contributors.
Encyclopaedia Britannica was perhaps the most well known and popular encyclopedia, and now it is entering the modern age with an official Windows Phone app. For $5 you get over 80,000 articles, tens of thousands of rich images, diagrams, and charts. The app also allows users to download articles for viewing offline.
The Encyclopaedia Britannica is a fortune of information for only $5. Buying the app will get you a 1 year of unlimited access. Download it now and start learning!