Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good resource on Native American Indian Calendars

Borrowed the book on interlibrary loan; it is a broad resource on calendars of the Native American cultures. It is clearly collected with a European mindset, thus does not perfectly reflect the lunar-based Native American calendar, and often there are only five or six members of any group polled to create the material on the calendar (which therefore fails to capture some of the diversity in the month-naming), but it is very broad in scope and an excellent starting-point for a serious student of the calendars of those who were here before Columbus was.