The Book of Sin is an unlockable activated item.
Effect[]
- On use, spawns a random coin, heart, bomb, key, battery, pill or card near Isaac.
This item belongs to the Bookworm set. Collecting three items from this set will transform Isaac into Bookworm.
Notes[]
- Hearts are proportionally more likely to be generated, with Red Hearts, Soul Hearts and Black Hearts each having a 1/9 chance of being chosen, the other 6/9 being distributed among the other categories.
- Each category has a 1/7 chance of being chosen.
- The card category includes runes, Dice Shard, Emergency Contact and Cracked Key.
- The heart category has the following distribution:
Type Chance Red Heart48.3% Soul Heart16.1% Black Heart16.1% Bone Heart6.4% Rotten Heart6.4% Eternal Heart3.2% Gold Heart3.2%
- Half Red Hearts, Half Soul Hearts and Blended Hearts cannot be generated.
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- Coins can be of any type, with higher value coins, including Lucky Pennies, and Sticky Nickels, being rarer.
- Bombs and Keys will always be singular (unless Isaac has BOGO Bombs and/or Humbleing Bundle).
- The Book of Sin cannot generate a Micro Battery.
Synergies[]
- Error: No Book of Virtues interaction found for "The Book of Sin".
In-game Footage[]
Trivia[]
- The Book of Sin is a reference to the Seven Deadly Sins. Unlike other Book items, The Book of Sin doesn't appear to be based on a real book or scripture.
Gallery[]
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3DS The icon of The Book of Sin as seen on the lower 3DS screen.
 Books
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 The Binding of Isaac: Rebirth
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