Library (Item Pool)

Item Pool
Normal/Hard	Treasure Room	Shop	Library	Curse Room	Boss	Secret Room	Devil Room	Angel Room	Golden Chest	Red Chest	Beggar
	Devil Beggar	Key Master	Bomb Bum	Planetarium	Crane Game	Rotten Beggar	Battery Bum	Old Chest	Wooden Chest	Mom's Chest	Baby Shop
Greed Greedier	Treasure Room	Shop	Library	Curse Room	Boss	Secret Room	Devil Room	Angel Room	Golden Chest

Items in this pool can be found in the Library.

Name	ID	Icon	Weight	Description
Anarchist Cookbook	5.100.65		1	Spawns six Troll Bombs around the room.
The Bible	5.100.33		1	On use, Isaac gains 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. Guarantees a Devil Room or Angel Room will be open after beating a boss while holding it. Increases the chance by 12.5%.
Book of Revelations	5.100.78		1	Gives one Soul Heart, increases the chance for a Devil or Angel Room, and changes the boss of the current floor to 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.
Book of Shadows	5.100.58		1	Creates a protective shield, nullifying all types of damage for 10 seconds.
The Book of Sin	5.100.97		1	Spawns a random pickup, pill, card, or trinket.
How to Jump	5.100.282		1	Upon use, 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.
Book of the Dead	5.100.545		1	Upon use, spawns a friendly Bony or an orbital bone for each enemy killed in the current room.
Monster Manual	5.100.123		1	Spawns a familiar from a list of of familiars for the current room. Spawns a familiar from a list of of familiars for the current floor.
Book of Virtues	5.100.584		0.2	On use, spawns an orbital Wisp familiar that fires spectral tears but can be destroyed. Also becomes a passive item that causes other active items to spawn themed Wisps.
Lemegeton	5.100.712		0.2	Spawns the ghost of a random passive item, which orbits Isaac but can be destroyed. While the ghost is alive, Isaac gains that item's effects.