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Biblo Archivist
Locate all the lore books in Hallowfall.
Biblo Archivist is a Hallowfall exploration achievement that requires you to locate all 11 lore books scattered across the zone.
Grab The Big Book of Arathi Idioms
Find 
The Big Book of Arathi Idioms at 48.11, 39.56 inside the house to the left.
Find Care and Feeding of the Imperial Lynx
Head to 69.36, 43.98 and enter the house to the right to pick up 
Care and Feeding of the Imperial Lynx.
Collect From the Depths They Come
Go to 57.79, 51.77 where 
From the Depths They Come is lying on the ground near the water.
Pick Up Shadow Curfew Guidelines
Travel to 64.21, 28.09 and look inside the house near the carrot by the wall to find Shadow Curfew Guidelines — this is a different item from the Shadow Curfew Journal.
Locate Shadow Curfew Journal
Head to 59.81, 22.11 to collect Shadow Curfew Journal, which is a separate book from Shadow Curfew Guidelines.
Grab The Song of Renilash
Go to 70.21, 56.85 and enter the tent to collect The Song of Renilash — if the book does not appear, a nearby campaign quest may be phasing the zone, so complete that questline first.
Pick Up Lightspark Grade Book
Travel to 52.64, 60.01 to pick up 
Lightspark Grade Book.
Collect 500 Dishes Using Cave Fish and Mushrooms
Head to 43.91, 49.95 and go into the house to the right to find 
500 Dishes Using Cave Fish and Mushrooms.
Find Light's Gambit Playbook
Go to 68.69, 41.42 where Light's Gambit Playbook is located on the bridge.
Grab Palawltar's Codex of Dimensional Structure
Travel to 48.75, 64.71 to collect Palawltar's Codex of Dimensional Structure.
Collect Beledar - The Emperor's Vision
Head to 56.56, 65.18 to pick up Beledar - The Emperor's Vision, completing all 11 books required for the achievement.
Tips
All 11 books can be deleted from your inventory after reading them — if you ever need to re-read one, it will reappear at its original location.