If one book's done this well, you want to write another one that does just as well. There's that horror of the second novel that doesn't match up.
My mother told me two things constantly. One was to be a lady and the other was to be independent, and the law was something most unusual for those times because for most girls growing up in the '40s, the most important degree was not your B.A. but your M.R.S.
Left Behind takes what to some people may be unbelievable predictions from the Bible and shows how they might play out. It makes the events of biblical prophecy understandable and thus believable.