In Over Your Head

Steps

 * Speak to Councilman Graves
 * Go to Councilman Graves' Home
 * Read Books (5)
 * Return to Corallysa

Lore
Reading the books in Councilman Graves' home gives you the following lore: Lords of the Nine, Realms of the Nine Hells, The Obsidian Palace of Abriymoch, Baator's Reckoning, and Infernal Affairs