When the first two sets of Penguin Great Ideas were released, book design devotees swooned unanimously, as they did to the follow-up Great Loves and Great Journeys series.
Well, Penguin are planning a third Great Ideas series to appear in August 2008, and some of the covers have been shown online. The first two series used red/black and cyan/black colour schemes. This series uses green and black. Click for more detail.
The colour scheme and the titles of the middle two shown above (Concerning Violence and The Spectacle of the Scaffold) make me think of the old Penguin Crime paperbacks (see some here).
A few I'm not quite sure about yet, but on the whole this looks to be another wonderful-looking set of books. I'm not certain who designed them, but I suspect it was David Pearson.
By the way, the Great Ideas series seems also to have been taken up in Germany, with some different titles. David Pearson shows his covers for that series here.