A book about Haskell's approach to the null problem.

You can find the current release in a variety of formats under the release directory. To view older releases, check out a specific Git tag.

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Thank you to all who've contributed so far!

• Introduction
• Haskell Basics
• Functor
• Applicative
• Monad
• Other Types
• Conclusion
• Technical review
• Copy editing
• Release v1