The Very Short Introductions series (or VSI series) is a book series published by the Oxford University Press publishing house since 1995. Each book in the series offers a concise yet cogent introduction to a particular subject. Written by acknowledged experts, most books are between 100–150 pages and contain suggestions for further reading. Authors often present personal viewpoints, but each introduction is intended to be balanced and complete.
As of October 2010, there are more than 250 titles in the series. The publisher states that "the series will encompass every major academic discipline, offering all readers an accessible and abundant reference library."