It would be Graham Hutton's Programming in Haskell. That one little chapter on parser combinators was totally worth it. If I can include this functional pearl "A play on regular expression", Not a book though. These two showed how composition and simple abstraction could make the solution super beautiful.
Typographic jacket · original cover not fetched
FROM THE SHARED SHELF · 2006–2026 SAMPLE
Programming in Haskell
2 readers recommend it across 2 discussions
Topics are model-inferred labels.
Keep it on your reading list
THE WORD OF MOUTH
What made it worth passing on?
Original Hacker News comments, in the readers’ own words.