Hidden Knowledge is a short story in the World of Warcraft Official Strategy Guide.
A human warlock enters a tavern in Goldshire, making sure its inhabitants assumed he is just another mage. When nobody knew or cared what he was doing he snuck into the back room, and down into basement in order to find another warlock that could teach him secret knowledge. After making sure no one else had discovered them he began his training.
- Hinted to be non-canon.
- ^ https://twitter.com/MickyNeilson/status/525757228825858048 Neilson on Twitter