critiques of the book. If you’re going to revise a 
book that’s made a bit of a splash and people have 
had things to say about it, before you do the 
revisions, you look at what they’d said.

And it seemed to us that there were two kinds of 
critique: the nitpicker, of whom fortunately there 
were quite a few, and they’re a little annoying at 
the time, but really, you have some of the top 
people in the world, some of the top reviewers 
working for you for free, debugging your book. 
Pointing out, “No no, it was 1856, not 1865, you got 
it backwards!” And you know, here’s hundreds of 
hours of top-flight brains picking through and