Off-by-magnitude error. 300m readers / 300k books is 1,000 readers per book, not 100. (Assuming readers are allocated evenly and each person buys one book/yea

Off-by-magnitude error. 300m readers / 300k books is 1,000 readers per book, not 100. (Assuming readers are allocated evenly and each person buys one book/year, both of which are ... unlikely.) But this is how long-tail distributions are formed. Poisson distribution, power functions, Zipf's law, etc., etc.