interesting genre, a bit more involved than mere popularization of science, like one i read a few months back on chlorophyll, revolves around everything you want to know about the sun, from a variety of perspectives.

chapters on science, beginning and end of book were interesting, chapters on literature etc, the middle dragged and put me to sleep, which probably says more about my interests than the interest level of the writing.

chapter on calendars worth anyones time, rest of book worthwhile to those already fascinated by these topics.

i appreciate the effort and the research, browse chapter on calendars to see if it grabs you.