Irving Kristol interviews Donald Kagan on the "origins of war and the preservation of peace," the title of Kagan's 1996 book on that subject.
Kristol refers in that interview to a series of lectures on Ancient Greece that Kagan gave at Yale and that the university makes freely accessible on the internet as as an "Open Yale Course." That's a series of lectures I want to attend.
Each lecture has an "assignment." For example, the introductory lecture assigns: Pomeroy, Burstein, Donlan and Roberts. Ancient Greece. Oxford University Press: New York, 1999, pp. 1-40. When I went to Amazon for that title, I saw a number of editions, the latest, the 3rd, a $50.48 text book.
Checking on half.com, I found a 2007 paperback edition for $1.00.
Has there been so much new discovered in the last 8 years that an introductory text on Ancient Greece requires an expensive third edition?
See how the internet disrupts the publishing side of academia and how Yale itself, with its open access lectures, similarly disrupts the 20th Century model of the American University.