> Spending 4 years, full time from what it seems, on a book with a (let's face it) niche audience.& Four years, yes, but much less than full time. Usually arou

> Spending 4 years, full time from what it seems, on a book with a (let's face it) niche audience.& Four years, yes, but much less than full time. Usually around an hour a day, often less. I work full time at Google and the book was a (very involved) hobby. > that's an opportunity cost of 200k* Yes, there's definitely a financial opportunity cost. But when I see someone working a job they hate eight hours a day, I often wonder what the satisfaction opportunity cost of that is. What could they be doing instead that would be more meaningful to them? I'm unlikely to make enough money from the book to justify the time (though my first book made me much more than I expected), but I do think it will bring enough other rewards to be worth the time.