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Libraries are rooms that must be opened with a key. They can contain at least one book, card or rune in them. The books are free to pick up.

The list of books that can be found in the library can be found here.

Contents[edit | edit source]

A Library can take one of the following layouts:

  • 2 Books
  • 1 Book and a random card
  • 1 Book and 2 random cards
  • 2 Books and a Little Battery
  • 1 Book and 2 Little Battery
  • 3 Books
  • 1 Book, with 4 more Books locked behind Key Blocks
  • 5 Books, each behind Key Blocks
  • 4 Books blocked by Spikes
  • 4 random cards or runes
  • 2 Books and a Key Master

Notes[edit | edit source]

  • From the outside, the library is identical in appearance to the Shop. One of the ways they can be distinguished is if Isaac has a mapping item such as Spelunker Hat or Compass. Generally, the library will be closer to the spawn than the shop.
  • Once all books in the library pool have been picked up, items from the Treasure Room pool will spawn instead.
    • This can be achieved by repeatedly re-rolling the contents of a Library with The D6.
  • Added in Afterbirth Chaos will replace the books with items from random pools, allowing you to get passive items without rerolling.
  • Added in Afterbirth † Maggots can spawn in the library.

Trivia[edit | edit source]

  • The music that plays in the Library is the same as the one played in Ending 14.

SmallIsaac.png Rooms SmallIsaac.png

Boss Room Icon.png
Boss Room
Mini-Boss Room Icon.png
Mini-Boss Room
Treasure Room Icon.png
Treasure Room
Shop Icon.png
Arcade Icon.png
Challenge Room Icon.png
Challenge Room
Boss Challenge Room Icon.png
Boss Challenge Room
Curse Room Icon.png
Curse Room
Sacrifice Room Icon.png
Sacrifice Room
Secret Room Icon.png
Secret Room
Super Secret Room Icon.png
Super Secret Room
Library Icon.png
Devil Room Icon.png
Devil Room
Angel Room Icon.png
Angel Room
Vault Icon.png
Dice Room Icon.png
Dice Room
Bedroom Icon.png Bedroom2 Icon.png
Super Secret Room Icon.png
Super Secret Room Icon.png
Boss Rush
Super Secret Room Icon.png
Crawl Space
Super Secret Room Icon.png
Black Market