The library's layout is conformed by six levels:
- First vat filled with wax at the far end of the library.
- Small studio with the Crystal Chime guarded by a spear-wielding, red-eyed Lothric Knight.
- Darkened room with a moving bookcase that gives access to a secret room with the Witch's Locks and the Power Within pyromancy.
- Kickable shortcut ladder to the second floor, from where the Avelyn can be reached by jumping on top of a series of bookcases below.
- Lever between two bookshelves near the front-central railing and guarded by several Clawed Curses. Pulling it reveals a hidden corridor on the second floor with a chest containing a Titanite Slab.
- Ladder that connects to the fourth floor on the balcony.
- Second wax vat upstairs and to the left.
- Hidden area revealed by pulling a lever to the right of the wooden bridge (must be reached from the fourth floor), with a corpse sitting on a chair holding the Scholar Ring.
- Wooden bridge where the final confrontation with the Crystal Sage is more likely to take place (the bridge reaches the fourth floor's level at its highest section).
- Hidden room behind an illusory wall on an alcove on the left wing with a Boreal Outrider Knight inside that drops the Outrider Set, and a corpse sitting on a chair holding the Soul Stream sorcery a bit further.
- Shortcut lift to the first floor at the middle of the stairs that lead to the fifth floor.
- Corpse holding the Fleshbite Ring at the end of the corridor filled with Clawed Curses on the right.
- Exit from the library to the roofs section.
- Undead Bone Shard on a corpse sitting on a chair on the rear-central area (after coming from the roofs section).
- Kickable shortcut ladder to the fifth floor.
- Third wax vat near to the library's main exit.
- Ultra greatsword-wielding, red-eyed Lothric Knight in front of a balcony on the front-central end, guarding two Titanite Chunks.
- Main exit from the library and to a courtyard where Knight Albert, Kamui and Kriemhild ambush the player.
- Main article: Lothric Castle (bonfires)
- Clawed Curse
- Corvian Storyteller
- Gertrude's Knight
- Grand Archives Scholar
- Hollow Soldier
- Lothric Knight
- Black Hand Kamui
- Boreal Outrider Knight
- Crystal Lizard ×8
- Crystal Sage (mini-boss)
- Daughter of Crystal Kriemhild
- Lion Knight Albert
- Blessed Gem
- Chaos Gem (drop: Crystal Lizard)
- Crystal Chime
- Crystal Gem (drop: Crystal Lizard)
- Crystal Scroll (drop: Crystal Sage)
- Divine Blessing
- Divine Pillars of Light
- Estus Shard
- Fleshbite Ring
- Golden Wing Crest Shield (drop: Lion Knight Albert)
- Gotthard Twinswords*
- Grand Archives Key*
- Greirat's Ashes*
- Heavy Gem (drop: Crystal Lizard)
- Hollow Gem
- Homeward Bone (×3)
- Hunter's Ring
- Large Soul of a Crestfallen Knight (×2)
- Lingering Dragoncrest Ring+2
- Onikiri and Ubadachi (drop: Black Hand Kamui)
- Orbeck's Ashes*
- Outrider Knight Set (drop: Outrider Knight)
- Power Within
- Refined Gem (drop: Crystal Lizard)
- Sage's Crystal Staff (drop: Daughter of Crystal Kriemhild)
- Sage Ring+1
- Scholar Ring
- Sharp Gem (drop: Crystal Lizard)
- Shriving Stone
- Soul of a Crestfallen Knight (×2)
- Soul of a Nameless Soldier
- Soul of a Weary Warrior
- Soul Stream
- Titanite Chunk (×10)
- Titanite Scale (×13)
- ×8 are found on corpses throughout the area.
- ×2 are dropped by a Crystal Lizard.
- ×3 are found in a chest.
- Titanite Slab (×2)
- Inside a chest that is accessed from opening a hidden pathway behind a bookcase.
- Awarded after defeating the three Gertrude's Knights at the top of the area.
- Twinkling Titanite (×12)
- ×9 dropped from Crystal Lizards throughout the area.
- ×3 are found in a chest at the highest floor.
- Undead Bone Shard
- Witch's Locks
* If required conditions are met.