Any resources on where to go to learn these topics?

HaskellBook.com will teach you quite a number of them. :)

The Reddits for the different functional programming languages are a good place to hangout (and a frequent source of blogs and videos on these topics), and for FP in non-FP languages, there are good Github communities (e.g. http://github.com/fantasyland/, no association with FIOL).

I'd also humbly suggest that LambdaConf 2017 (May 25-27) is a great place to learn more about functional programming. There will be a special two-day LambdaConf workshop prior to the conference that introduces the basics of functional programming (no background knowledge), another that is aimed at a slightly more experience audience, and then at the subsequent conference, plenty of workshops and sessions to learn many of these topics (and others).

It's a journey, but everyone can get there if they have the interest. Most of the resources out there (blogs, videos, even e-books) are free, and the remainder are low-cost if you are already working in tech.

Good luck and please just let any of us lurker functional programmers know if you need a hand. :)

Is there anywhere to preview some content from HaskellBook.com ? Its a little pricey for to just take a chance without seeing any same content. The TOC looks good but that's not much indication of writing style.

There's a sample excerpt containing a few chapters: http://haskellbook.com/assets/img/sample.pdf .

It is pricey, but it is also very good. The content is quite up-to-date (e.g. covers Foldable/Traversable, teaches the Functor-Applicative-Monad progression) and working through the exercises made a lot of things click that I didn't understand before.

Not an exhaustive list, but the best resource I've come across for a number of these topics is this course http://www.seas.upenn.edu/~cis194/spring13/lectures.html

It's terse but comprehensive, and the exercises have been a pleasant source of a-ha moments. There's a more recent version of the course offered, but I haven't been through it.

And what do you recommend for your mathematically inclined friends? Any books you recommend for asset allocation and rebalancing principles?

Yup, I've written a brief primer to accompany my will: https://github.com/nickgieschen/investingguidelines

None, just put your money in an S&P 500 fund. I doubt you will be able to beat that in the long run anywhere else (Even though there are flaws w/ how the S&P 500 is run now [1]).

[1] http://www.joshuakennon.com/sp-500s-dirty-little-secret/

You can do better by diversifying more. By picking asset classes with a low correlation, you can reduce risk while increasing return. Hence, you can eek our more from a simple mix of say:

60% US 30% Int'l 6% REITs 4% Gold

All of this can be bought with low cost mutual funds.

http://thismatter.com/money/investments/portfolios.htm