For a short summary of the ideas in Degroot's book see his recent article in the Washington Post, "Some places flourished in the Little Ice Age. There are lessons for us now."
Degroot is currently working on two more books, one that extends the ideas of The Frigid Golden Age through space and time and another that examines the environmental change in outer space. Click here for more information on his past and present projects. He also teaches about these topics at Georgetown. To see some of his course syllabi, click here.