This is an excellent book from the pen and paper era, that is more than modern (functional programming is popular now): https://www.amazon.com/Introduction-Func

This is an excellent book from the pen and paper era, that is more than modern (functional programming is popular now): https://www.amazon.com/Introduction-Functional-Programming-Calculus-Mathematics/dp/0486478831/ref=sr_1_1?ie=UTF8&qid=1476002462&sr=8-1&keywords=functional+programming+book https://www.amazon.com/Introduction-Functional-Programming-C...