In this fifteenth episode of Letters and Numbers, we crunch the numbers and work out what it takes to become a seriously bestselling author.

Not what it takes to write a bestselling book - what it takes to become a bestselling author. Yes, there's a difference!

Join author, linguist, and mathematician-in-the-making Sarah on an exploration of the world through the lens of letters and numbers!

Links from this episode:

See the Fifty Shades of Grey book fort

Links to all statistics in this episode are available on Sarah's blog

Help Sarah become a moderately-selling author!