Should I Give the Book to Earana?
In The Elder Scrolls IV: Oblivion, handing the book to Earana during the Fingers of the Mountain quest unlocks a unique shock spell, while giving it to Teekeeus advances the Chorrol Mages Guild recommendation. The better choice depends on whether your build needs the spell or prefers guild progression. If you want both rewards, a common approach is to let Earana read the book first and then return it to Teekeeus afterward, assuming the quest state allows it.