If you are OK with a non-JS book I would recommend Functional Programming in Scala. Scala is a nice middle ground between pragmatic languages like Java and more esoteric languages like Haskell (which to purists in either camp means that it is worthless, I would disagree).
This book specifically does a good job introducing Scala and motivating FP concepts.
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If you are OK with a non-JS book I would recommend Functional Programming in Scala. Scala is a nice middle ground between pragmatic languages like Java and more esoteric languages like Haskell (which to purists in either camp means that it is worthless, I would disagree).
This book specifically does a good job introducing Scala and motivating FP concepts.