Bookworm

Transformations

Guppy	Beelzebub	Super Bum	Yes Mother?	Bob	Fun Guy	Leviathan	Conjoined
Spun	Seraphim	Oh Crap	Bookworm	Spider Baby	Adult	Stompy

Upon picking up 3 items from the following list, Isaac will fire tears out of both eyes simultaneously 25% of the time. This effect stacks with items such as 20/20, The Inner Eye and Mutant Spider, multiplying the number of tears.

The chance of firing double tears is not affected by luck.

Activated Collectibles

Name	ID	Icon	Quote	Description
Anarchist Cookbook	65		Summon bombs	Spawns six Troll Bombs around the room.
Book of Revelations	78		Reusable soul protection	Adds 1 Soul Heart, increases the chance for a Devil or Angel Room to appear, and increases the chance for the next boss to be a Horseman (except on XL floors and floors with fixed bosses such as Mom).
Book of Secrets	287		??????	Upon use, gives the effect of Treasure Map, The Compass, or Blue Map for the duration of the current floor.
Book of Shadows	58		Temporary Invincibility	Upon use, creates a protective shield nullifying all types of damage for 10 seconds.
How to Jump	282		It's about time you learned how	Gives Isaac the ability to jump (over gaps, spikes, etc.).
Monster Manual	123		Temporary buddy generator	Summons a random familiar for the current room. Can summon familiars not yet unlocked.
Satanic Bible	292		Reusable Evil	Upon activation, Isaac gains a black heart.
Telepathy for Dummies	192		Temporary psychic shot	Upon activation, grants homing tears for the current room.
The Bible	33		Temporary Flight	Upon activation, Isaac gains flight, allowing him to pass over all obstacles in the current room. Instantly kills Mom, Mom's Heart, and It Lives when activated, but will kill Isaac when activated while fighting Satan.
The Book of Belial	34		Temporary DMG up	Upon use increases damage by 2 for the current room and by a further +50% if the character also has the Blood of the Martyr. Guarantees a Devil Room or Angel Room will be open after beating a boss while holding it, or increases the chance by 12.5%.
The Book of Sin	97		Reusable Item Generator	Spawns a random pickup, pill, card, or trinket.
The Necronomicon	35		Mass room damage	Damages all enemies in the room significantly.
Book of the Dead	545		Rise from the grave	Upon use, spawns a friendly Bony or an orbital bone for each enemy killed in the current room.

Trivia

• A bookworm is a person who's devoted to reading, especially of books.