NEW - Tome Upgrades can now be found in random treasure. These wondrous items will allow you to upgrade an existing inherent bonus in an ability score to the next higher inherent bonus. Upgrades that turn a +4 Inherent Bonus into a +5 Inherent Bonus will be able to be found in treasure levels of 27 and higher.
Level 27 of higher.
That means level 23 quests on EE with +2 Jewel, right? I honestly like the idea. Just have to see if they really exist or they are another lie (*cough* +5 tomes in EE CitW *cough*)