I don’t like it. I found several places where it over-simplifies information, sometimes unnecessarily vague, and sometimes less than accurate.  When asking the question, “How long will one month take?” instead of saying about thirty days, it just says that a month is longer than a week but shorter than a year.  On the next page it states, “People around the world measure time the same way,” before going into describing seconds, minutes, hours, days, weeks, months, and years.  But there are plenty of places in the world where people live in remote areas without access to detailed timekeepers, where time is still measured much more vaguely. On the next page it states that “Clocks measure seconds, minutes, and hours,” yet not all clocks measure seconds. On the next page it describes a calendar by stating that, “Each month gets a page.”  Yet lots of calendars show a year or a week on one page.  There are better time book available.  Choose something else.