A Quick Study is an achievement to read all the People lore books in Act I of Diablo III. Throughout players' travels across Sanctuary, they will find journal entries, scrolls, diaries, notes and letters written by people both known and unknown. They often record thoughts and feelings of events that occurred in the past, oftentimes even before the time of Diablo I. They will usually be found at random within certain areas or at a certain spot of the game world, and usually refer to some historical event tied to that general area. Every single one has been voice recorded, which can be heard anytime the player wishes, which convey the mood and emotional state of the author at the time of writing.