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 April 2009, there are more than 200 titles in the series, including History, Theology, Literary Theory, Philosophy of Science, Postmodernism, Emotion, Animal Rights, Ethics, Shakespeare, Hume, Terrorism, The Spanish Civil War and Evolution. The publisher states that "the series will encompass every major academic discipline, offering all readers an accessible and abundant reference library."
The VSI series has been extremely commercially successful, and many of the books have been used as textbooks in introductory university courses.
Many of the books were commissioned explicitly for the series, but a number had previously been published by OUP.