It drives me crazy when I read fiction books which use Fahrenheit (and sometimes don't even specify units) as I don't understand that measurement or many other

It drives me crazy when I read fiction books which use Fahrenheit (and sometimes don't even specify units) as I don't understand that measurement or many other imperial units at all. One would think in this day and age that authors could use some semantic markup and one's e-reader could use the reader's preferences to format the book for easier understanding/comprehension