[sudshekhar]

IMO, its best to be a Generalizing Specialist (T-shaped individual[0]). How to become that is another matter altogether.

I would also suggest reading Mastery by Robert Greene. Though the book is unnecessarily long, the points he raises are pretty good. Reading the anecdotes is also quite interesting.

0 - https://www.forbes.com/sites/andyboynton/2011/10/18/are-you-...

[beat]

Good book. I'd also add Pragmatic Thinking and Learning, by Andy Hunt. Different, but a very useful approach to "how to learn".