He's been writing for about 12 years, and he crossed the million threshold at least two years ago - so about a decade. I'm not sure about the answer to the sec

He's been writing for about 12 years, and he crossed the million threshold at least two years ago - so about a decade. I'm not sure about the answer to the second question, I'll ask him over a beer next time we get together. I would say that an important factor was investing in professional cover art, editing, etc. He also more or less timed the rise of Kindle books, quite by accident, and I think that also helped his career. But there's no substitute for caring about his work and putting in the time, which he definitely does.