Here is a list of papers and writings of what I consider are essential Haskell reading.

- Haskell 2010 Language Specification
- Typeclassopedia
- The Essence of Functional Programming
- How to make ad-hoc polymorphism less ad hoc
- Monads for functional programming
- Monad Transformers: Step-By-Step
- Some interesting features of Haskellâ€™s type system
- Functional Programming with Bananas, Lenses, Envelopes and Barbed Wire
- Applicative Programming with Effects
- The Algebra of Algebraic Datatypes
- Kleisli Arrows of Outrageous Fortune
- Theorems for free!
- Beautiful Concurrency
- Imperative Functional Programming
- Reverse Engineering Machines with the Yoneda Lemma
- From Monoids to Monads
- Tackling the awkward squad
- Functional Reactive Animation
- Flipping Arrows in coBurger King
- Duality for Haskellers
- Parallel and Concurrent Programming in Haskell
- Beautiful Differentiation
- Typed Tagless Interpretations and Typed Compilation
- Species and Functors and Types, Oh My!
- The Implementation of Functional Programming Languages
- Datatype-generic Programming in Haskell
- Giving Haskell a Promotion
- Faking It: Simulating Dependent Types in Haskell
- OutsideIn(X): Modular Type Inference with Local Assumptions