Book (Disambiguation)

Book may refer to:

Items

 * , activation spawns six Troll Bombs
 * , activation adds a Soul Heart to Isaac's health,
 * , activation grants the effect of The Compass, Treasure Map, or Blue Map for the current floor. Cannot activate the same effect twice.
 * , activation grants a shield that protects Isaac from any damage for ten seconds.
 * , activation along with a movement key allows Isaac to jump over obstacles and gaps in the chosen direction
 * , activation summons a random familiar for the duration of the room /for the current floor
 * , activation applies a Black Heart to Isaac's health. When used, Boss Room items become Devil Room items that Isaac has to pay for.
 * , activation grants homing tears for the current room
 * , activation grants flight for the current room and instantly kills Mom and Mom's heart / It lives
 * , activation grants 2+ damage for the current room. (damage stacks) While held increases Isaac's chance to get Devil Rooms or Angel Rooms by 12.5%.
 * , activation drops a random pickup. (excluding chests)
 * , activation deals 40 damage to every vulnerable enemy in the room.
 * , activation spawns an orbital bone familiar, a friendly Bony, or a friendly Black Bony for each enemy killed in the room.
 * , activation spawns a wisp that orbits Isaac and fires small spectral tears alongside him, and passively grants a wisp-spawning effect to all other active items
 * , activation spawns the soul of a random passive item to act as a destructible orbital familiar, which grants that item's effect as long as it lives

Locations

 * Library, commonly contains at least one book-related item.