As far as I can tell, he came from a family of ridiculously talented, literary, and intelligent people, and he opted to make a a solid living for decades off of his financial skills so he'd be free to write whatever he felt like writing later in life, without needing to worry about money. So by the time he got around to writing the mystery novels, he had a lifetime of experiences to draw on, and a very long time to hone his craft.
no subject
As a rule, yes.
How is he always awesome?
As far as I can tell, he came from a family of ridiculously talented, literary, and intelligent people, and he opted to make a a solid living for decades off of his financial skills so he'd be free to write whatever he felt like writing later in life, without needing to worry about money. So by the time he got around to writing the mystery novels, he had a lifetime of experiences to draw on, and a very long time to hone his craft.