I found each of these invaluable at different points in my life. YMMV

Biz - the Personal MBA - Josh Kaufman - http://amzn.to/2aFsj3c

Org - the Fifth Discipline - Peter Senge - http://amzn.to/2aNpbQz

SciFi - Perdido Street Station - China Mieville - http://amzn.to/2aNoWFn

Parenting - The Continuum Concept - Jean Liedloff - http://amzn.to/2aZEAAL

I've been teaching some folks how to code. It's helped a bit. I also have been reading more business books - things like the personal MBA [1], The Goal, how to win friends and influence people (old versions before he died). Basically, make an effort to speak their language, because they (probably) won't put in the effort to learn yours. Some will appreciate the effort and meet you half-way, others will be amazed that you can communicate with them.

[1] : http://www.amazon.com/Personal-MBA-Master-Art-Business/dp/15...

The Personal MBA is a great program and his book is just as good (http://www.amazon.com/Personal-MBA-Master-Art-Business/dp/15...). My wife and I are part-way through both and he covers just about everything you could care to know about running a successful business.

I have a BA and MA from a large state school and found the most rewarding things from my tenure in college were the relationships I built--not the classes. I would NEVER go into debt for a Master's or MBA--it's just not worth it. Find someone else to pay (scholarship, assistantship, teaching) or get to work, it's better experience anyway.