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5 Best Functional Programming Books

We analyzed 4+ expert sources, curated book lists, and recommendations from successful people to find the 5 best functional programming books according to the internet β€” not just one person's opinion. Each book on this list was mentioned by at least two independent sources, and the ranking is based on how frequently each title appears across all sources studied. This consensus-based approach ensures you get recommendations backed by multiple experts, not a single reviewer's bias.

Goal: Find the best Functional Programming books according to the internet (not just one person's opinion).

Method:

  1. Search for "best functional programming books" and study the top 4+ pages.
  2. Add only the books mentioned 2+ times.
  3. Rank the results neatly here.

5 Best Functional Programming Books

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1

Modern Java in Action

Lambdas, Streams, Functional and Reactive Programming

by Raoul-Gabriel Urma
2

Programming in Scala

by Martin Odersky
3

Programming Scala

Scalability = Functional Programming + Objects

by Dean Wampler
4

Scala for the Impatient

by Cay S. Horstmann
5

Scala in Action

by Nilanjan Raychaudhuri

Sources

Edited by

Richard Reis

Software engineer whose passion for tracking book recommendations from podcasts inspired the creation of MRB.

Anurag Ramdasan

Lead investor at 3one4 Capital whose startup expertise and love for books helped shaped MRB and its growth.

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5 Best Functional Programming Books (2026)