The last 10 years isn't a great sample (was 2011 really not part of the "digital era"?). It'd be interesting to see this spread across the last century -- my su

The last 10 years isn't a great sample (was 2011 really not part of the "digital era"?). It'd be interesting to see this spread across the last century -- my suspicion is that bestsellers have increased in length over the last 50 years, due to diminished serialization.