A manual is a gizmo resembling a book that unlocks a feature for the character that uses it, either unlocking the next tier of traits or becoming a commander.
 Trait manuals
Trait manuals increase the number of trait points that can be spent in each trait line, allowing access to the higher-tiered traits. You must use the manuals in order: you have to unlock the adept tiers before you can use the master's manual; the second tier must be unlocked before you can use the grandmaster's book. When you use a manual, all your current trait points are refunded allowing you to redistribute your points without visiting a trainer.
The Commander's Compendium allows characters to become a commander and manage a squad in World vs World. At a cost of 100 , it is one of the most expensive vendor-sold items in the game.