Library (Item Pool)

Items in this pool can be found in the Library.

Activated Collectibles[]

Name	ID	Weight	Description
Anarchist Cookbook	5.100.65	1	Spawns six Troll Bombs around the room.
The Bible	5.100.33	1	Grants flight for the current room. Instantly kills Mom, Mom's Heart, and It Lives when activated, but kills Isaac when used on Satan.
The Book of Belial	5.100.34	1	+2 damage for the current room. Passively guarantees a Devil Room or Angel Room will appear while held. +2 damage for the current room. Passively increases the chance of finding a Devil Room or Angel Room while held.
Book of Revelations	5.100.78	1	Increases the chance of a Devil Room / Angel Room appearing while held. Upon use, gives one Soul Heart, and replaces the boss of the current floor with a Harbinger if possible.
Book of Secrets	5.100.287	1	Gives the effect of Treasure Map, The Compass, or Blue Map for the duration of the current floor. If all effects are active, X-Ray Vision is provided for the floor instead. Highlights any Tinted Rocks and rocks with Crawl Space in the room.
Book of Shadows	5.100.58	1	Creates a protective shield, nullifying all types of damage in the current room for 10 seconds.
The Book of Sin	5.100.97	1	Spawns a random coin, heart, bomb, key, battery, pill or card near Isaac.
How to Jump	5.100.282	1	Isaac jumps in the direction he is currently moving, allowing travel over obstacles and enemies.
The Necronomicon	5.100.35	1	Deals 40 damage to every enemy in the room.
Satanic Bible	5.100.292	1	Gives one Black Heart. Replaces the boss room item on the current floor with a Devil Deal.
Telepathy For Dummies	5.100.192	1	Gives homing tears for the current room. Also gives +3 range.
Book of the Dead	5.100.545	1	Creates a friendly Bony, Black Bony, or an orbital bone for each enemy killed in the current room. Creates a friendly Bony, Black Bony, Bone Fly, Revenant, or an orbital bone for each enemy killed in the current room.
Monster Manual	5.100.123	1	Spawns a familiar from a specific selection for the current room. Spawns a familiar from a specific selection for the current floor.
Lemegeton	5.100.712	0.2	Spawns a wisp representing a random passive item, which orbits Isaac but can be destroyed. While the wisp is alive, Isaac gains that item's effects. Generation uses the current room's item pool 25% of the time, otherwise a random pool.

Passive Collectibles[]

Name	ID	Icon	Weight	Description
Book of Virtues	5.100.584		0.2	Spawns a destroyable orbiting wisp familiar that fires tears and deals contact damage. Also acts as a passive item that causes other active items to spawn themed wisps.

The Binding of Isaac: Rebirth