Functional Programming
Functional Programming is so hot right now.
Learning Functional Programming by Anjana Vakil
Fun Fun Function (Mattias Petter Johansson) does a great series on explaining the concepts.
Libaries
Hey Underscore, You're Doing It Wrong!
Ramda is the libary to use for FP.
Thinking in Ramda: Getting Started
GitBook
A great gitbook on FP (does get complicated towards the end tho)