The Chenga – Sherekhan Tome of Wisdom is an item that goes into your Adventurer’s Tome equipment slot. The Chenga Tome is an upgraded version of the Adventurer’s Tome, which gives 30% additional Combat EXP from quests as well as an increased Vision Range of +150m. The increased EXP from quests makes the Chenga Tome a must-have if you want to level by questing (which is currently the fastest way to level from 59 – 61).
To obtain the Chenga Tome, you must complete a questline called [Lv.53] The Adventurer’s Tome Regarding the Legend of Chenga. The questline has 22 quests in total and can be found in your suggested tab of your quest log. The questline requires at least one character in your family to be over level 53 and you will also need 170 energy in total to complete. Other than that the questline is easy to complete and doesn’t require you to kill any monsters. It is mostly just running from one place to another.
The Chenga Tome is family bound, meaning you can swap it between characters by putting it in your storage for another character to collect. However, if you lose your Chenga Tome, you will need to complete the quest again on a different character.