[ ] pg 85 -- "Also, you can only put an expression in it, you can have a statement." -- I'm not clear on what this sentence means, I suspect it's missing a word.
[ ] pg 90 -- "(city has a numeric index that is unique): city_mpg.reindex([0,0, 10, 20, 2_000_000])" -- I think you mean to refer to city_mpg in the text again.
[ ] pg 127 -- "This makes it easy to do things like calculate the percentage of quarterly snowfall the fell in a day:" -- quarterly snowfall that fell in a day.
[ ] pg 167 -- "if frac > 1, my specify replace=True" (perhaps must specify replace=True?)