Tomes are an upcoming feature, coming when the Runecrafting [[::Category:Professions|Profession]] is released with the Taking Flight patch on February 10, 2015.
Players will be able to create Tomes within the Runecrafting menu. Equipping the Tome to your character will allow it to gain EXP, and once a certain amount is reached the Tome will level up. Leveling up will grant players items, depending on what kind of Tome it is. So far the Devs have talked about Infinium and Robotic Salvage Tomes. It's assumed that more types of Tomes will be available.