Library is a room in The Binding of Isaac.

The Library contains one or more book-themed items from the Library item pool.

It can also contain some cards, batteries, beggars, and rarely a Wooden Chest.

Items inside the Library will often be locked behind Key Blocks or placed behind spikes.

The Library has a 5% chance of appearing on each floor, and only one may generate per floor.

Some Library room layouts are only available upon unlocking certain Shop upgrades.

This page shows the latest information as of the new Repentance+ (Online Co-op) DLC.
To see information about this room for the previous Repentance version, check this page instead.

The Library is associated with the Library item pool. Items that spawn in this room will be selected from the associated item pool.

• Check out the room description on the external Isaac Wiki.