A Goodreads user
A Goodreads user asked Brandon Sanderson:

Hi Brandon! When you're writing/planning a new series, how much time would you say you spend on world building? Do you like to have a good sense of the world before you starting writing or do you adapt and evolve the world as you write?

Brandon Sanderson I do a moderate amount ahead of time, but it depends on the series--most importantly, the length of the book. If I'm writing a shorter work, I can develop more on-the-fly, knowing I can make it all consistent after the fact. If I'm writing in a series, I need much more ahead of time. Developing the world for The Way of Kings took years.
Brandon Sanderson
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