High Quality Content by WIKIPEDIA articles! The Very Short Introductions series (or VSI series) is a book series published by the Oxford University Press publishing house since 1995. Books in the series offer concise introductions to particular subjects, intended for a general audience but written by experts in the field. (For example, authors of VSI entries in philosophy include A. J. Ayer, Roger Scruton, A. C. Grayling, and Peter Singer.) Individual titles range from 96–224 pages in length, with most between 120–180, and nearly all contain suggestions for further reading. While authors may present personal viewpoints, the books are meant to be "balanced and complete" as well as thought provoking.