I don’t understand why Artscroll uses this word. The overviews found at the beginning of their books are actually not overviews. (Look up the word if you are not sure what it means). They should have been called what they are, namely, “introductions.”

Marc B. Shapiro, “Answers to Quiz Questions and Other Comments, part 1”, The Seforim Blog (20 February 2012), n. 10 {http://seforim.blogspot.com/2012/02/answers-to-quiz-questions-and-other.html}