Well, perhaps you can judge a book by its cover, at least to some extent. Artist Neal Adams was commissioned by the editors of this collected volume of essays to illustrate a still far from mainstream, yet captivating, theory on the dynamics of the earth – the expanding earth theory – championed by a select group of individuals (most notably S. Warren Carey) from the 1950s to 1980s. The theory remains an unaccepted, but perhaps unappreciated, explanation for the dynamics of the continents and their respective biotas, which drifted apart as a small, primordial, continental earth expanded and ocean basins developed to fill in the gaps.