The reward book is an item received from Diango for participating in the Combat Academy survey during the Evolution of Combat's beta period. This item will grant experience in any skill of your choice. The experience gained is equal to ten times of that normally gained from the Jack of Trades aura.
- ^ The RuneScape Team. "EoC Beta: Mad Scientist Outfit & Survey XP Reward." 23 November 2012. RuneScape News.