What a beautiful way of thinking about this. Every time I read a nonfiction book, I am investing in my business skills, musicianship or teaching abilities. Any time I read a fiction book, I am investing in my imagination.
I have taken plenty of online courses, attended conferences and master classes, and done any number of other things to invest in myself over the years. I had just never really thought of it that way.
But Ramit's framing of it will only help to ensure that I'll keep plugging away on my current book (Gary Vaynerchuk's Crushing It!) so I can get on to the next investment.