Thaumonomicon

The Thaumonomicon is a book the player can create that not only details the player's discovered research, but allows for future research to be conducted.

Acquisition
After picking up any Vis Crystal for the first time in a world, the player will be prompted with the following message: "Your fingers tingle strangely as you handle the crystal. What does that mean? Maybe some rest will inspire you."

After sleeping, the player will receive a copy of the Strange Dreams book, telling them how to create Salis Mundus. After this point, any bookshelf right clicked on with Salis Mundus in hand will produce a Thaumonomicon.

Usage
Researching new topics can only be done through the Thaumonomicon, making it the most important item to progress in Thaumcraft. It also lets you view your previous research, showing you recipes, basic knowledge about the game and telling you how some items can be found or used.

Layout
Each research category (Fundamentals, Alchemy, Auromancy, Artifice, Infusion, Golemancy and Eldritch) receives its own tab on the left hand side of the Thaumonomicon's GUI. In each tab, topics which cannot yet be researched are displayed with a darkened image, topics available for research flash and unlocked research is displayed normally. Keep in mind that some topics will not appear at all until certain items have been scanned or certain topics unlocked.