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
- Crystal Chime
- Crystal Scroll (Crystal Sage's drop)
- Divine Blessing
- Divine Pillars of Light
- Estus Shard
- Fleshbite Ring
- Golden Wing Crest Shield (Knight Albert's drop)
- Gotthard Twinswords*
- Grand Archives Key*
- Greirat's Ashes*
- Hollow Gem
- Hunter's Ring
- Onikiri and Ubadachi (Kamui's drop)
- Orbeck's Ashes*
- Outrider Knight Set (Outrider Knight's drop)
- Power Within
- Sage's Crystal Staff (Kriemhild's drop)
- Scholar Ring
- Shriving Stone
- Soul Stream
- Titanite Chunk ×8
- Titanite Scale ×10 (3 in a chest)
- Titanite Slab ×2 (1 in a chest, 1 from Gertrude's Knights' drop)
- Twinkling Titanite ×3
- Undead Bone Shard
- Witch's Locks
* If required conditions are met.