Reference

Ad-hoc material that supports the rest of the book without fitting inside a specific chapter. Dip in when you need a term defined, want to trace what changed between versions, or are curious about the library's performance envelope.

PageWhat it is
More Functional ThinkingRecommended reading beyond Higher-Kinded-J: books, papers, and community resources for deepening your functional programming knowledge.
GlossaryConcise definitions of the terms used throughout the book: HKT, type class, monad, witness, and so on.
Release HistoryA version-by-version record of what changed and why. Useful when picking up after an upgrade, or writing your own release notes against a specific version.
Benchmarks & PerformanceEmpirical measurements of the library's overhead and scaling characteristics, with guidance on when HKT simulation matters and when it doesn't.

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